
About
This app allows users to record geological data, including points of interest, orientations, and contacts, with detailed annotations and photos. It offers multiple methods for orientation input and data visualization, with seamless integration for data exchange across devices and platforms.
What's New in GMDE Lite
7.3.0
June 27, 2026
v. 7.3.0 -- 26 June 2026 • NEW -- All of the toolbar buttons now have popup menus rather than message boxes for making your selection. These menus are faster and more elegant than the previous way of doing things. • NEW -- Pause and resume an activity such as collecting a GPS track or sketching on a map. The functionality has been enabled by the new menu interface: e.g., tap the measure tool and choose Record GPS track from the menu. The toolbar measure button starts flashing. when you need to pause a track, tap the flashing toolbar button. The resulting menu now shows Pause and End. Tap pause. When you're ready to resume tap the toolbar button and the menu will now say Resume and End. Tap resume to continue collecting your track. To end the track, tap the button and choose End from the menu. • NEW -- From the Add Orientation menu (accessed from the Orientation button on the toolbar), you can now go directly to collecting and orientation by Device Orientation (when you want to put your phone on the plane to be measured) or directly to the sighting an orientation screen. When you go to the sighting screen, as soon as you tap the display when there is a valid measurement the screen will close and you will see the orientation in the Orientation Details screen. Both device orientation and sighting were, and still are, available from buttons in the toolbar for the Orientation Details screen. The just gives you a little fast way of collecting those measurements. • NEW -- You can now enter an orientation in the orientation details screen by tapping and dragging in the stereonet at the bottom of the screen. • NEW -- The Rangefinder can now be used to measure the azimuth and inclination by sighting through your device camera. v. 7.2.0 -- 2 June 2026 • NEW -- The rangefinder now has an option to measure vertical angles only. If you know your horizontal distance to the outcrop, the app can calculate thickness of horizontal units in a cliff face (or measure the height of a treen, etc.). Just set the lower angle to the base of the unit and the upper angle to the top of the unit. There are lots of other potential uses for this function. • NEW -- When measuring a strike and dip with the device orientation, a green line will appear from topo to bottom on the stereonet face when the long axis of the phone is horizontal. An arrowhead on one end of the line shows the physical direction of the given strike direction. Explanation: Because the app measured the pole to the plane directly, you can place the phone on the bedding surface in any orientation. But, sometimes, you want to know where the strike line is (e.g., when collecting and marking an oriented sample). This allows you to find the actually strike line in the plane as well as determine which direction you should mark the sample so that it coincides with the measured strike line. • FIXED -- Switching between base maps now works more smoothly without showing a blank white screen. v. 7.1.0 -- 11 May 2026 • NEW -- Subsampling and smoothing contacts are now undoable. • NEW -- Additional database integrity checks are now in place. The checks are carried out every time you open a database. If corruption is found, the problematic rows are reported. • NEW -- If the app experiences a hard crash (with no error message), the next time you start up the app, it will warn you of an abnormal exit and will inform you that it is starting up without opening up the last database used (just in case). V.7.0.2 -- 13 April 2026 • NEW -- Correction for camera bump on the back of modern phones.
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FAQ
What is GMDE Lite used for?
GMDE Lite is designed for recording and analyzing geological data in the field. It allows users to log points of interest, capture orientations, and map contacts, with features for annotation and data visualization.
Is GMDE Lite free to use?
Yes, GMDE Lite is available for free. The app does not have any in-app purchases or advertisements, making it completely free for users.
What devices does GMDE Lite support?
GMDE Lite is available on iPhone, iPad, and iPod touch devices. It is optimized for small screens but also works well on iPads, especially with an Apple Pencil.
How does GMDE Lite handle data exchange?
Data can be exchanged between GMDE Lite and Desktop versions, imported from Stereonet Mobile, GIS programs, and uploaded/downloaded to StraboSpot. It also supports copy and paste between devices using Apple HandOff.
Can I use GMDE Lite offline?
While GMDE Lite can function with an online base map and elevation server, core data recording and visualization features are available offline. Data exchange and certain online services require a connection.
What is the age rating for GMDE Lite?
GMDE Lite has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger students learning about geology.
How often is GMDE Lite updated?
The latest version of GMDE Lite is 7.2.0, last updated on June 2, 2026. Updates typically include improvements to functionality and compatibility.
What are the benefits of using an Apple Pencil with GMDE Lite?
Using an Apple Pencil with GMDE Lite on an iPad significantly enhances the editing of contacts by allowing for more precise lassoing and dragging of individual vertices compared to using a finger on smaller screens.





