Align your biorhythm with the sun
About this app
When the sun is at the highest point, it's noon, so it's 12:00 p.m., right? That's the way things should be. This app shows you the solar time at your location. 12:00 p.m. is natural solar noon, and the sun is at its highest point. 12:00 a.m. is the natural solar midnight, and the sun is at its lowest point. See solar time in comparison to your zone time in the main app, and see the solar time in a nifty widget. You can use this app to wake up at a solar time of your choosing.
Licensed under GPL-3.0-only.
What's New in v1.4.0
Imported from the F-Droid repository index.
Version history
Jul 6, 2019 · 1.3 MB · Android API 17–28 · code 9
Imported from the F-Droid repository index.
SHA-256 1580de5952ab621d6457438025af80d0bf1f942901dbad2b45e675dbc404f0fb
Apr 22, 2019 · 1.3 MB · Android API 17–27 · code 8
Imported from the F-Droid repository index.
SHA-256 d9fa4e4deb72314cd19df4699fd2dd4e57cc8b376e42a540854d3bb940121619
Aug 10, 2018 · 1.3 MB · Android API 17–27 · code 6
Imported from the F-Droid repository index.
SHA-256 04c8d96ffaa28266219a3f31786ac78a631c35fbd61076167cebe45dd5c4794f
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
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 com.gitlab.kreikenbaum.suntime.fdroid 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, 1.3.3 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Sun Time 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 Sun Time, and a listing is removed when the evidence for it stops holding up.
Get Sun Time
Every source we list for com.gitlab.kreikenbaum.suntime.fdroid 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
1580de5952ab621d6457438025af80d0bf1f942901dbad2b45e675dbc404f0fb
Signing certificate
e997cebd08ae07af23c88fd2d3759dfb7c4d370dde77ea38a3b4324ae3e1e138
Permissions Required
What each permission lets Sun Time 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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