TopoDroid

4.1
485 reviews
Content rating
Everyone
100K+
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Content rating
Everyone
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About this app

TopoDroid - Cave Surveying with Android

IMPORTANT: The version on Google Play is old and will not be updated. Current version on: https://marcocorvi.altervista.org/caving/speleoapps/speleoapks/TopoDroidApks.html

TopoDroid helps you to take survey data and accurate sketches while you are in the cave, so that you can detect errors in the data while you are still on the spot and correct them. TopoDroid has many functions to help you get the most out of a surveying trip. In this way, by the time you finish it, a working map is almost ready.

TopoDroid is designed to work *ONLY* with DistoX, DistoX2, SAP5 and BRIC4. The survey data can be also entered by hand. TopoDroid supports DistoX calibration, and other advanced DistoX features.

NOTE. DistoX is not a Leica product, and TopoDroid does not work with any Leica Disto.

TopoDroid handles one survey session at a time. It is not a cave survey project manager. For that purpose there are many good PC programs, and TopoDroid exports survey data in several cave program formats (among them: therion, compass, visualtopo, walls, survex), as well as dxf, csv, kml, trackfile, shapefile. Sketches can be exported as therion, csurvey, dxf, svg, shapefile, and png image.

Full list of features, user manual, and docs on https://sites.google.com/site/speleoapps/home/topodroid

DISCLAIMER
This app is open-source, free and ad-free. It has no warranty. By using it you agree that the author is not responsible for any loss of data you might incur, or damage whatsoever, including damages to DistoX/SAP5/BRIC4 devices.

ANDROID PERMISSIONS
- TopoDroid requires the following permissions: WRITE_EXTERNAL_STORAGE, BLUETOOTH, BLUETOOTH_ADMIN
- Certain functions depend on these permissions:
CAMERA (photos at stations and legs), RECORD_AUDIO (audio recording station comments), ACCESS_FINE_LOCATION (entrances geolocation).
- INTERNET, required only to install translations of the user manual.

TRANSLATIONS (v. 5.1.40)
M. Guerrero (spanish), D. Ros (french), A. Kozhenkov (russian), V. Georgiev (bulgarian), M. Keller (german), F. Toso (italian), H.-J. Luo (chinese), P. Suru (hungarian), R. Severo (potuguese), M. Jurecka (slovak), K. Borgiel (polish), A. Pologea (romanian)
Updated on
Jul 14, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.2
447 reviews
A Google user
May 24, 2019
I love Topodroid so much it makes me smile when I use it. It is an absolute joy to survey with. I often survey alone.I have a DistoX2 and a little target made from a dive cookie and some bendy wire and now I can blast through the cave with loops closing close to perfectly every time. I download to walls and everything runs beautifully except for the odd crash here and there which is no big deal. The documentation is excellent. It took me a while before I reluctantly forced myself to read it, but I am glad I did. There is quite a bit to topodroid and fluency in its operation is a must to get the best out of it. The documentation it is quite complete though I do have one or two questions I will take to the forums. Future features I would like to request to be considered would be : 1. A measuring tool on the drawing screen just to measure between 2 points, like the one on google earth. 2. A function to plot all or a set of surveys not just one. I dont need to sketch over the plot, just be able to see the bigger picture. Thanks for the great software and making my caving more fun!
2 people found this review helpful
marco.corvi
September 22, 2019
A measuring tool is in the overview window, as well as in the 3D viewer. ThManager is designed to put together a set of surveys. It is limited to the survey data but (with the 3D) it provides a view of the big picture.
Vladimír Fuka
March 31, 2023
The description should really say that this version is old and will not work with new devices. New APK must be doenloaded elsewhere (sadly from a http, not https site).
4 people found this review helpful
ivana m
July 30, 2020
it's an extremely useful app:) i just like to use it! by years, it has become an inseparable part of caving.
36 people found this review helpful
marco.corvi
July 30, 2020
thanks. i'm glad that cavers find the app useful.

What’s new

TopoDroid X
Content rating
Everyone
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App support

About the developer
CORVI MARCO
marco.corvi@gmail.com
Italy