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Archive Page 3 of 14

AutoCad For Your Android

Application Name: AutoCad WS

Description: Viewer/editor of AutoCad files stored at the AutoCad WS website.

Publisher’s website: AutoCad WS

Cost: Free

Version/date reviewed: v.1.0  /  4-20-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

AutoDesk’s AutoCad WS site is a free cloud-based site for storing and editing AutoCad files (DXF and DWG formats); see this post on the Free Geography Tools site for more info. The AutoCad WS Android app lets you access these files, files sent as email attachments, or files in online services like DropBox, then view/edit/annotate them, and have the changes synced to your AutoCad WS account.


You will need to have an AutoCad WS account to use the app; you can create one from the app, but it’s probably easier to create one from the website. Log in to the account, and you’ll get a list of available files for viewing/editing; tap on any one to open it.


Files will open at the last zoom level they were used at; uses standard pinch to zoom commands, so if your phone doesn’t support that, this app will be pretty useless. The command bar at the bottom can be scrolled left/right; included are commands for:

  • Adding features (circles, lines, rectangles, text, etc.) and measuring distances
  • A markup tool for annotating drawings
  • A color selector for features and objects
  • Undo/redo buttons
  • A universal select tool; choosing a shape brings up Move/Scale/Rotate/Erase/Copy options
  • A layout selector (Model/Layouts)
  • Normal/grayscale views
  • A “share” option that lets others view and edit the file


With most options, tapping on the option button brings up suboptions, as with the Add features button above …

acd_4 … and the Markup option above.

Changes can be synced to the cloud version of the file if you have an online connection, using the Sync button on the file list page.

Other issues: On a smartphone with a decent-sized screen (4”), this app works OK for viewing files and marking them up. But trying to add and edit features on such a small screen is an exercise in futility, both because of the size of the screen and the inaccuracy in using your finger to create features. The app does work on tablets, and I’m guessing editing would actually be possible on one of these, especially if you have a stylus. The browser version has the ability to view CAD files georeferenced against a Google Maps background, and I wish that were an option on this version; also wish it supported feature addition via GPS. Finally, don’t expect the full feature set of AutoCad on a free Android app, or even the free browser-based editor; you can do basic operations, but nothing fancy.

Final thoughts: Great for viewing and annotating AutoCad files in the field with a smartphone, but the screen is really too small for editing. If you’ve got a tablet, though, editing is likely to be more practical. If they added native geospatial capabilities to the app, it would be a killer app for everyone; as is, it’s really only for AutoCad users, but is perfect for them.

Petit DF – A Direction Finder

Application Name: Petit DF

Description: Rhumb line and great circle direction finder

Publisher’s website: inda3

Cost: Free

Version/date reviewed: v.2.7  /  4-17-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

Petit DF (stands for “small direction finder”) shows the direction to a user-selectable destination. And it works, but with quirks.


Start up the app, and it will show your position plotted as a green dot in what appears to be a Bing Maps interface. The green flag is also your destination, and is set at startup at your current position. The blue dot indicates the current direction magnetic north, red dot magnetic south, and they move as you rotate the device to maintain the correct orientation.


The map zoom controls are the +/- in the left corners; the “v” at the upper right toggles you between the default satellite view and a street maps view, while the button at lower right makes the map view rotate to match the direction you’re currently facing in. Latitude/longitude are shown at the bottom, along with the nearest geocoded address/location for your destination. Magnetic declination is also shown, which makes it odd that the app doesn’t use those to correct magnetic directions to true directions.


You can set a destination to get the direction to in several ways. First is to zoom/scroll the map to find your destination, then tap on it. You can pinch to zoom, but that has an annoying tendency to relocate your destination to a spot on the map you touch during the pinch operation, so using the +/- zoom controls is a better choice (scrolling with tap and drag doesn’t have this problem). The direct “rhumb line” direction to the destination is shown in red, and the distance to the destination is shown at top. Surprisingly, the actual compass bearing direction to your destination is not shown; this would be helpful in giving you information you could use with just a simple compass to maintain a heading to that destination.



There’s also a Search function that lets you enter an address, keywords, or latitude/longitude position; once located, you can save that position in database to load in directly later. For example, entering Mecca as the destination and loading it in would put the green destination flag at Mecca, as above. Pity it doesn’t show the magnetic declination value for the destination, as this would make it a handy reference app for this value.


To go back to your current position, tap the button at lower right to get the view above. The red line shows the “rhumb line”, the straight line you’d draw on a Mercator projection between your current location and the destination; following this line would get you to the destination, but it wouldn’t be the shortest route across the Earth. The app instructions say that it will draw a pink line to indicate the “great circle” route, the shortest distance between your current location and the destination when traveling on the Earth’s spherical surface. For short distances, the rhumb line and great circle will generally be very close to the same; for long distances, like the US to Mecca, they should diverge dramatically. At first glance, that pink great circle line seems to be entirely missing here. However, if you look closely at the two screenshots above, you’ll see a short pinkish stubs indicating the start, stop, and general direction of the great circle route, but the rest is missing.


Other issues: The app appears to be a resource hog; other apps, like my screenshot app, slowed down dramatically when it was active.

Final thoughts: Potentially useful app, but hobbled by the lack of a bearing degrees indicator, use of magnetic rather than true north, and the buggy great circle route line. Could still be useful if you need to determine the direction to multiple points saved in the database from your current location. Hopefully the author will fix these issues in future updates.

Location-Tagged Notes With SpotPad

Application Name: SpotPad

Description: Create simple location-tagged notes, show their location in Google Maps

Publisher’s website: SpotPad

Cost: Free (ad-supported)

Version/date reviewed: v.0.0.1  /  4-15-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

SpotPad lets you create a simple text note, and tag it with your current GPS location.


From the initial program screen, press your unit’s Menu buttton, and select Add note; the screen above will appear. Type in the text you want to save. In order to tag the note with your current location, you need to press the Update Location button; SpotPad will not automatically add that data. But if you like, you can save a note without location data. When done, choose Save from the menu options, or just use the back button. Your GPS only fires up when you’re in note editing mode, and turns off when you save the note – a nice touch that saves on battery life.


Available notes will be listed here; notes tagged with coordinate data will have a “pin” icon next to them, untagged notes will lack the pin. To open a note for editing, just tap on its listing here. The default note title is the first 25-odd characters of the note, but you can modify that when editing the note, using the Edit title option in the menu during editing.


But you can also bring up multiple options by doing a long-press on a note listing. Open just brings up a full view of the note, with the option to edit it. Delete removes the note (no recovery possible). Edit title lets you modify the title (which doesn’t affect the note text). Show location plots the location where the note was taken in Google Maps:


A tap on the “pin” icon brings up its title and coordinates:


Unfortunately, tapping on this information pop-up doesn’t take you to the note text directly; hope this is added in a future version.


Other issues: None; worked fine.

Final thoughts: Other apps, like Evernote, Catch Notes, and Springpad offer note geotagging with extra features like pictures, but with a somewhat more complicated interface, and no titles for plotted points. If all you want is just a quick and easy geotagged note app, SpotPad does the job.

Download US Aviation Charts For Android

Application Name: OpenFlight Map

Description: Downloads US aviation charts for viewing on your Android phone.

Publisher’s website: SoftOutfit

Cost: Free (donationware)

Version/date reviewed: v.1.7  /  4-3-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

There used to be a free aviation maps online server available for a number of Android mapping apps, including OruxMaps and MOBAC; however, it seems to have disappeared; rumor has it there’s some kind of patent issue involved. OpenFlight Map lets you download and view some of these maps for the US, but currently with no navigation capabilities.


After agreeing to a liability waiver, you’ll get a US map covered with red Xes. Tap on a rectangle, and get the option to download the aviation chart that covers either the North or South half. These are fairly large files (~8 MB), so WiFi is the best data connection choice.


When done, a scrollable/zoomable map view will open up.


When one map for a zone is downloaded, a green slash will replace the red “X”; when both are downloaded and stored on your phone, a green square will appear. Maps are stored locally on your phone, but can be deleted to free up room on your SD card.

Other issues: This is NOT a navigation app; there’s no GPS capability, routing or waypoints, though the author indicates he may add those eventually. And this is just for reference/casual viewing; it’s not recommended for actual navigation use. It apparently also isn’t working on some Android tablets.

Final thoughts: Hopefully, the aviation map servers will go back online at some point, but until they do, this is the next best thing.

Local Points Of Interest In Wikipedia

Application Name: Wikipedia Places Free

Description: Lists Wikipedia entries near your current location.

Publisher’s website: 2-3

Cost: Free ad supported version; $2 paid version removes ads.

Version/date reviewed: v.1.11  /  4-1-11

Phone/OS: Droid X / Android 2.2

Android Market (mobile app only)
Android Market (browser)


Straightforward app – gets you GPS location, and lists any nearby locations geotagged in Wikipedia. Tap on a list item …



… and go to the mobile browser view of that page; your phone’s Back button will take you back to the app.


Clicking on the “map icon” next to a listing brings you to a map view of that location; you can select any supported and installed  app (Google Maps here, but works with Bing, Mapquest, Locus, etc.). It’s accurate, but some kind of more-visible placemark would be useful.

Other issues: Lots of nags to upgrade to the ad-free version, but if you use it enough to be bothered by those, you really should upgrade.

Final thoughts: Other apps show Wikipedia locations as small icons on a map, that can be hard to tap accurately; this list approach definitely has advantages.

Handy Reference Guide To California State Parks

Application Name: CalParks

Description: Travel and info guide for the California State Parks system

Publisher’s website: California State Parks Foundation

Cost: Free

Version/date reviewed: v.1.0  /  3-31-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

If you’re vacationing or exploring in California, this is a nice little reference guide to the extensive California State Park system.


Starting up the app also starts up your GPS receiver to get a location; you can then get a list of parks sorted by distance from you (which I find the handiest), or also by park name.


Tapping on the Map button at upper right brings up the map view, with the state park locations flagged. Tapping on the icon at upper left shows your current position on the map.


Tapping on the arrows at lower left brings up pop-up windows for every park in alphabetical order. Unfortunately, there doesn’t seem to be an option to bring up pop-ups based on distance from you, which would be more useful.


Tapping on the pop-up, or on the park name in a list, brings up a page with more info. A lot more; there’s about 10 pages of info that you can scroll through for this park, Anza-Borrego Desert State Park. Included is info about wildlife, vegetation, history, trails and more; there’s also a direct link for making campground reservations.


Tapping the Explore This Park bar brings up a list of general guides and trips for various trails and excursions at the park.


The guides/trips include photos of trail highlights, information, the option to get driving directions, downloading information for use when you’re offline, and …


A map of the trail, with tappable pushpins that show the photographs corresponding to that point. If you’re hiking the trail and have GPS enabled, you can view your location on the trail as well.

Other issues: I’m quite familiar with this park, so I know that the list of available trips/trails isn’t complete. The trips seem to be taken from the EveryTrail.Com website (the developers of the app for the Cal State Parks Foundation), and they have many more trips listed; hopefully, some of these will be added eventually.

Final thoughts: Almost a model for what this kind of app should be; I hope EveryTrail gets the chance to make similar apps for other states. If you live in California, or are planning an outdoors-oriented trip there, this is a must-have app.

Monitor Critical Natural Events And Warnings With Disaster Alert

Application Name: Disaster Alert

Description: Plots current global disasters and warnings, brings up links for more info.

Publisher’s website: Pacific Disaster Center

Cost: Free

Version/date reviewed: v.1.1  /  3-28-11

Phone/OS: Droid X / Android 2.2

Android Market (mobile app only)
Android Market (browser)

The Pacific Disaster Center’s Disaster Alert app plots the position of current natural/manmade disasters and conditions of concern for the entire world. Events plotted include:

  • Hurricane/Tropical Cyclone (global)
  • Drought (global)
  • Earthquake (global)
  • Flood (global)
  • National Weather Service High Surf (for Hawaii)
  • National Weather Service High Wind (for Hawaii)
  • National Weather Service Flood (for Hawaii)
  • Manmade (global)
  • Marine (global)
  • Storm (global)
  • Tsunami (global)
  • Volcano (global)
  • Nuclear disasters (like the current Japanese power plant situation)

With wildfires coming soon.


Initial view is of the Western Hemisphere, with locations of concern plotted with icons. Pressing the icon at lower left zooms out to worldwide view …


This is a standard Google Maps view, so +/- controls will appear if you tap on the screen; you can also pinch to zoom if supported on your phone. The other icon at the bottom right brings up a control to switch between Google Maps’ aerial hybrid view, and the standard road map view.


Once zoomed in, I thought that a tap or long-press would bring up more info – no dice. Finally tried a double-tap, and that brought up a pop-up info box for that icon. But sometimes a single tap will work, and a double-tap won’t; the program seems to be very sensitive to how and where you tap.


The info box contains basic info; tap anywhere else on the screen to get rid of it (don’t press the Back button, as this just zooms the map out to full world extent). Clicking on the blue arrow at right takes you to web page with more info …


… usually an official government source (here, the Smithsonian Global Volcanic Activity Report), but it varies.


From the menu, you can also bring up a list of all current disasters/warnings, with links to more info. A Time Zone setting lets you configure the alerts to show both your local time, and Universal Time (UTC, aka Greenwich Mean Time).

Other issues: The app was incredibly slow and responsive the first time I started it, but speeded up subsequently; I’m guessing it had to do some kind of initialization. You cannot exit the program with the Back button on the phone; you have to use the Exit option from the menu, or the Home key.

Final thoughts: Handy tool for keeping track of the world’s state, despite some minor quirks.

Map Point Slopes And Directions With Rocklogger

Application Name: Rocklogger

Description: Map slopes and which direction they’re facing.

Publisher’s website: RockGecko

Cost: Free evaluation version limits you to 3 measurements every two minutes; $9.22 fee unlocks this restriction.

Version/date reviewed: v.1.01  /  3-27-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

A while back, I reviewed eGeo Compass, an app that maps slope and slope direction. The primary use is for geological mapping, but it could be used by anyone who has similar mapping needs (geomorphologists, archaeologists, gardeners, etc.). I thought eGeo Compass was pretty good, but the demo version was limited in functionality, and the registered version was a bit expensive at $13. Rocklogger offers the same basic functionality, the free version does more, and the registered version is cheaper, but it has some drawbacks as well.


App starts with the barest of screens. Tapping on Start new traverse brings up the option to name the data file, and also associate additional information. Unlike eGeo Compass, the free version of Rocklogger will let you export data in CSV format for use in mapping programs. If you’ve already stored a data file, you can also select it, and append new data points.


In measurement mode, the app will fire up the GPS to get your current position, and then display your current coordinates, along with your choice of three kinds of measured data:

  • Dip angle and direction: The slope in degrees, and the compass direction of that slope (you can choose true or magnetic direction)
  • Dip/strike: Commonly used in geological mapping. Dip is as above, but strike represents the orientation at which a geological strata intersects the ground surface; usually it’s 90 degrees less than the dip direction.
  • Magnetic field mode: Measures and records the magnetic magnitude vectors (XYZ), and the absolute magnitude

When you’re ready to make a measurement, lay the phone on the surface you want to measure, oriented so that the long axis of the phone (up/down) lies along the steepest slope).


Tapping on the Plane Type dropdown brings up a preprogrammed list of geological features you can assign to the point. However, you can add your own types (including non-geological ones), and subtract ones currently on the list, customizing it to your own requirements. The Settings section lets you reset this to the default. The Setttings section also implies that the app can save Rock Type input and let you choose from suggestions, but I couldn’t get that to work, possibly because I’m not using the default Android keyboard.

Pressing the Save incl. sensors button saves your current position and the measured data into the current data file; Save excl. sensors saves only your current position. You can set the app to require a long press to save data, to prevent accidental data recording. The evaluation version limits you to no more than three measurements in two minutes; the registered version allows unlimited measurements within any time frame.



Use the Back button to stop measuring, and bring you back to the startup screen; there now should be a listing for the new data file. Tapping the listing for that file name brings up the option to add more points, delete it, email it (useful for backup in the field, or exporting it to your computer for additional analysis), or open it in a compatible app for viewing/editing.

Other issues: Unlike eGeo, Rocklogger doesn’t currently have the option in either the free or paid version to plot recorded data in a Google Maps view, though the author indicates this is coming. Having latitude/longitude displayed in degree-minute-seconds, without the option to view it in decimal degrees, is annoying; fortunately, positions are saved in decimal degrees in the data file.

The biggest issue for me is that, unlike eGeo,  you have to have the phone aligned so that its long axis lies along the direction of steepest slope, in order to get an accurate measurement. The app really needs to be set up so that it will automatically determine the direction and magnitude of steepest slope automatically, regardless of which way the phone is laid on the surface; that would not only improve accuracy, but speed up measurement time. I’ll monitor the app to see if this is implemented.

Final thoughts: I started out biased towards Rocklogger because its evaluation version allows data recording and export; you need eGeo Compass’s registered version to enable that. I do like the additional recording options, and multiple data inputs, especially the customizable dropdown. And unlike eGeo, you have the option to record the true direction, not just magnetic. But Rocklogger’s requirement that you have the phone oriented along the direction of steepest slope is a dealbreaker for me; it reduces accuracy, and slows down the overall recording time. If this were fixed, I’d give the edge to Rocklogger; but as is, eGeo Compass is currently the better app.

Simultaneous Large Compass View and Map With Urban Scout

Application Name: Urban Scout

Description: Displays large compass view along with Google Maps display

Publisher’s website: Cogi Systems

Cost: Free

Version/date reviewed: v.1.9  /  3-25-11

Phone/OS: Droid X / Android 2.2


Android Market (mobile app only)
Android Market (browser)

Lots of apps have a large compass display, invariably filling the whole screen (like the excellent Compass app). Other apps can show your general compass direction, sometimes with a small position arrow pointing the same way as your phone (e.g. the standard Google Maps app). Urban Scout is a simple app that combines the two: half the screen shows a large, standard compass (with numerical heading display), while the other half shows a Google Maps view.


You have the choice of either a Google Map satellite hybrid view (with roads labeled), or the standard Google Maps roads-only display. The compass at the top shows true north, not magnetic; wish all app makers defaulted to that. Your phone’s GPS will fire up automatically, locating you on the map. The red triangle position marker will be pointed in the same direction your phone is facing, with the faint yellow circle overlay showing the uncertainty in position.


From the menu, you can mark a single position with a blue dot; mark a new position, and the previous marked position disappears. No other functions, like navigation, but it will remember the marked position. You can scroll the map to a different location, but it will slowly scroll back center your current position in the map display. Standard zoom controls (pinch to zoom where supported, otherwise +/- buttons that appear when you tap on the map.



Not a lot in terms of options from Menu/Settings. Toggle between the Satellite Hybrid and Maps mode, and set the default; mark your location; set units (English or metric); turn off the coordinate display bar in between the compass and map to show more of the map (as above).

Other issues: Wish it showed decimal degrees for latitude/longitude; I hate degrees/minutes/seconds.

Final thoughts: Simple limited app, but does the job. I like using it to get a rough feeling for which direction from my current location a landmark lies. One could always wish for additional functions (waypoint marking, navigation), but you can always get those from other apps.

Locus, A GPS Mapping Application – Part III: Tracks, Waypoints And Miscellaneous

The final part of my review of the Locus map app for Android; here are links to Part I: Interface, and Part II: Maps.

The first thing you need to know about waypoints in Locus is that the program insists you assign them into named Categories; especially noticeable the first time you try to create one. I resented this initially, but have since decided that requiring this kind of categorization/organization is a really good idea. Waypoints can be added using the Points manager, normally accessible in the right toolbar.


After choosing a Category, you get the waypoint list for that category, along with additional options at the bottom. From left to right, they are:

  • “+” – Create a new waypoint. You’ll be given the choice of your current location, the current map center, an address, coordinates, or (if you have the optional Locus Contacts free plugin), one of the contacts in your address book. Tip: If you want to use map center, you should turn off the “center map on GPS location” button (left button on bottom toolbar), otherwise the map can pop back to your current location. Then scroll to the location you want to place the waypoint, and bring up the Points manager.
  • Check mark – Selects/deselects all waypoints. Checked waypoints are visible on the map, unchecked waypoints aren’t. You can also turn on/off individual waypoint display by tapping directly on the checkbox.
  • Arrowed circle – Refreshes the list
  • Boxes with down arrow – Sorts the waypoint list by name or distance from your current location
  • “Grouped” boxes – Lets you filter waypoints by icon
  • Trash can – Deletes selected waypoints


Tapping on a waypoint brings up more options:

  • Plot it on a map
  • Navigate to it
  • Edit/delete it
  • Send it to a navigation app (like Google’s Navigation); bring up the Google Street View if available; share it with compatible app; load it into either Locus’s built-in compass, or a compatible third-party app like GPS Status.


When you add a waypoint with the “+” control, you’re only given the option to name it (default is coordinates). But once recorded, you can go back and assign additional info to the waypoint, including standard stuff like a description and custom icon; plus,  non-standard stuff like taking a photo at that location and assigning it to the waypoint, or reverse-geocoding the nearest address based on the waypoint’s coordinates. Not sure how well the Photo feature works – on at least one occasion, a photo seemed to become “disassociated” with its waypoint (may have just been a random glitch). Reverse geocoding, on the other hand, worked perfectly, though this will require an active data connection. You’ll get the same screen when you edit an existing waypoint.



There’s a reasonably healthy default choice of icon graphics, but the app author describes a simple process by which you can use your own icon graphics for waypoints.


Finally, the author has recently added an augmented reality (AR) plugin that will superimpose a waypoints name/icon and “radar screen” on your Android unit’s camera view. My screenshot utility doesn’t capture the camera view, but just imagine a real-world view substituted for the white above. The radar screen shows the waypoint, but it’s so small and indistinct that it’s difficult to pick out. The Free version limits you to one minute of AR view; the $5.50 Pro version makes this unlimited.


For tracks, you have two options: either record your current movements as a track, or draw a track on the map screen. Both options are accessible from the right toolbar. If you choose to record your movements as a track, you’ll get a new toolbar at the bottom that lets you Start/Pause/Stop track recording …



or pull up an info window with current track statistics.


By default, tracks are saved with the current date and time, and there’s no way to change that immediately. However, if you go to the Data manager above (accessible from the top toolbar), you’ll be given the option to manage/edit your tracks. This Data manager also lets you create/edit/delete categories, gives you direct access to the Point manager for handling waypoints, and lets you Import/Export data in GPX or KML format. If you choose Tracks …


You’ll get a list of all the tracks stored in the app. Unlike waypoints, tracks aren’t assigned to a mandatory user-definable category, but are instead assigned a Locus-specific category that you can change. The controls at the bottom are the same as for waypoints, except for the missing “Add” option, not relevant here. Checking/unchecking a track determines whether it’s visible or not on the map display. Tapping on a track name brings up options to show a stats screen, export it directly as a GPX or KML file, show it on the map, delete it, or edit it …



One of the biggest advantages of Locus over OruxMaps is the customizability of waypoint icons and track colors. OruxMaps only has one waypoint icon, and while you can adjust the overall track color and width, you can’t specify different colors/widths for different tracks. Locus starts out with more waypoint icons, lets you add your own …


and also lets you specify different colors and widths for individual tracks, making them easier to identify on-screen.


The right toolbar also has an “Add track” button that lets you draw a track on screen, and then save it. Pressing this button brings up another toolbar to help with this function. The “+” button adds a track point at the current center map position, and the “-“ button removes the last track point added; the green check finishes the process and saves the track, while the red “x” aborts it. The center button, with the “right turn” logo, is interesting. If you specify two points on a track, the start and stop, then press this button …


… you’ll be given the option to automatically generate a routed track between those two points, for various forms of transportation. When you choose the desired transport …


You’ll see the route plotted, along with the direct-line connecting the start/stop; saving the track will only save the routed track, not the direct line.

Other issues: Apart from an occasionally-stubborn Bluetooth GPS connection, which could be resolved (see Part I), didn’t have any serious problems with the app.

Final thoughts: There’s no question that Locus is an outstanding Android map app. It works as it should, the interface is clean, map selection is good, and feature set is solid. In some aspects, like track/waypoint management, it’s vastly superior to OruxMaps; on the flip side, OruxMaps has a more customizable interface, and it’s easier to add additional online map sources to it. The one feature where OruxMaps is clearly superior to Locus is in your ability to add your own digital map imagery for viewing in OruxMaps; this is a feature I need all the time, and one not currently well-supported in Locus. Fortunately, with free/cheap versions of both apps, I don’t have to choose; I can see myself switching back and forth between the different apps on a regular basis, depending on what my current needs are. You’d be crazy not to have at least the free version of Locus on your Android unit (OruxMaps, too), and probably ultimately coughing up the $5.50 Pro registration fee to get rid of the ads.