Assist in cave surveying
About this app
Assists in cave surveying. It interfaces with an automated measuring device (the Disto-X) and builds up an accurate model of the cave. It also provides a sketching environment for the cave surveyor to fill out the details.
Licensed under GPL-3.0-only, by Rich Smith.
What's New in v1.12.2
Imported from the F-Droid repository index.
Version history
Jul 11, 2026 · 6.9 MB · Android API 23–35 · code 96
Imported from the F-Droid repository index.
SHA-256 fc0f7b4ded3ac4bd2a866d599c917d8c6cb15ef1fecfdbdff1301980f9633c6d
Jul 10, 2026 · 6.9 MB · Android API 23–35 · code 95
Imported from the F-Droid repository index.
SHA-256 ca30b689d5e97c7d0d6d906c32b1d7360756d1824b1dbfc066de23b676cccdc8
Jul 2, 2026 · 6.9 MB · Android API 23–35 · code 94
Imported from the F-Droid repository index.
SHA-256 7ce54d86644fbe6894a285482f0000c0501190e9595dbec18de35e9207dacc87
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be org.hwyl.sexytopo is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.12.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SexyTopo first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of SexyTopo, and a listing is removed when the evidence for it stops holding up.
Get SexyTopo
Every source we list for org.hwyl.sexytopo is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
fc0f7b4ded3ac4bd2a866d599c917d8c6cb15ef1fecfdbdff1301980f9633c6d
Signing certificate
a2fed33fea9f815c2df5d2ed0056c0243e6752cb2324945f9ec6ec362775f117
Permissions Required
What each permission lets SexyTopo do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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