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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.

Beta testers
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.

TopoDroid fundraising.

TopoDroid and the other speleoapps are  free and ad-free,
and will remain so.

Android operating system and its SDK are fast moving on.
New hardware is needed to continue the app development
and to keep it up to date.

If you find TopoDroid and the other apps useful for your cave surveying projects, or for other needs, consider supporting these apps development with a donation, and click on the PayPal button.