Mobile app · Education & science

AstroClock

Astronomically correct 24-hour clock: the Sun is the hand, the star sky turns.

Free, with trade-offs
Android
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Free, with trade-offsconfirmed by F-Droid
License: GPL-3.0+ — Open source (copyleft)confirmed by F-Droid
Open source: Yes
Commercial use: Yesconfirmed by F-Droid
Account required: not documented
Credit card required: Noconfirmed by F-Droid
Watermark: Not applicable
Ads: No
Platforms: AndroidEstablished by Android: F-Droid
Distribution: Available on F-Droid
Publisher: Holger Schoening
Latest version: 1.0 (3 September 2026)
Latest activity: 3 September 2026
Source code: github.com/GorArania/AstroClockApp

Overview

AstroClock is a clock and alarm mobile app, available on Android.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Astronomically correct 24-hour clock: the Sun is the hand, the star sky turns” — F-Droid, 10 November 2026
“Home screen widget in a clear compact layout” — F-Droid, 10 November 2026

At a glance

AstroClock is free, with trade-offs: it depends on one specific server to work.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
No advertising
Commercial use allowed

Weaknesses

Flagged by F-Droid: depends on the publisher’s online service

Sources and checks

Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) — 6 November 2026
Last technical check: 6 November 2026
Description from F-Droid — F-Droid (citation courte)

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