OpenTopoMap Viewer is an open-source (Apache-2.0) Android app by Serge Helfrich. The APK we host is 4.5 MB, it needs Android 7.0 or newer, and it declares 7 permissions.
The file on this page is OpenTopoMap Viewer 1.38, 4.48 MB, and it installs on Android 7.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time org.nitri.opentopo entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.
The manifest declares 7 permissions, including access to approximate location and precise location. Android asks you to approve those the first time the app needs them.
Its licence is Apache-2.0. We took this build from F-Droid, and the source for this exact version is linked below.
We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.
- Version
- 1.38
- Size
- 4.48 MB
- Requires Android
- API 24
- Package
- org.nitri.opentopo
- Signature checked on
- Sep 18, 2026
- Where this file came from
- F-Droid
- Licence
- Apache-2.0
- Source code
- Source for this version
File SHA-256: 0fa0362afc6f8f0c95a43e9aa6dfa3e6891dca0755d043cbac08d63557c22da3
Signing certificate (SHA-256): 0973936af17d47d3c8ee3b793b8250c8df3815c97b924ea35c510a2175ce0a92
We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.
Declared permissions
- ACCESS_NETWORK_STATE
- ACCESS_WIFI_STATE
- INTERNET
- ACCESS_COARSE_LOCATION
- ACCESS_FINE_LOCATION
- org.nitri.opentopo.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- REORDER_TASKS
Screenshots
