TopoDroid is an Android app for cave surveying.
It is designed to work with a DistoX, but can also be used without it, by entering the survey data manually.
Version changes and old apk.
TopoDroid is not a cave project manager.
ThManager is a prototype manager for surveys saved as Therion th files.
Topodroid has an open beta program. Opt-in link https://play.google.com/apps/testing/com.topodroid.DistoX
DISTOX important note
When you select a DistoX from a scan, TopoDroid tries to pair with it automatically.
TopoDroid has several BT connection settings: if you experience data transfer problems try using different settings (see the user manual for the documentation).
If you cannot find your Android device with a DistoX using TopoDroid, you should try to connect (and pair) to it using the Settings app. If even that fails you cannot use TopoDroid with the DistoX. This is not a problem of the app, but of your system implementation of bluetooth functionalities.