MarsClock

A Mars-time alarm clock, with times for MER, Curiosity, and Perseverance rovers.

Scott Maxwell · org.scottmaxwell.android.marsclock

Not rated yet 5K+ downloads v1.32 5.2 MB Android 6.0+ PEGI 3 · Everyone

Download APK 5.2 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v1.32 (32)
Updated: Sep 2, 2026 (1 month ago)
APK size: 5.2 MB
Requires: Android 6.0+ (API 23)
CPU support: Any (no native code)
Category: Tools (app)
Listed since: Feb 23, 2021 (at least)
Permissions: 8 (1 sensitive)
Website: plus.google.com/112648317373638762082/posts
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

MarsClock is an app by Scott Maxwell in the Tools category, listed since at least February 2021. It has no native code, so it runs on any Android processor.

Since version 1.20, the minimum Android version rose from 4.4 to 6.0. It asks for 8 permissions, 1 of them sensitive: display over other apps. It asks for the same permissions as version 1.30.

What's new in v1.32

Updating for API level 36 per Google Play Store policies. Also, layout now avoids the notification bar, making it easier to press the overflow menu and to read the title bar.

Description

From the listing uploaded by “appupdater”.

MarsClock is an alarm clock that lets you see times for all three of NASA's Mars rovers -- Spirit, Opportunity, and Curiosity -- as well as the InSight lander and the new Perseverance rover. You can also set alarms in Mars time, either as one-shot alarms or as alarms that will repeat every sol (that is, every Martian day). This app is released for free by a (former) rover driver on NASA's Mars missions. Enjoy it!

Version history

4 versions are listed, going back to v1.20. Since v1.28 it requires Android 6.0+.

v1.32 LATEST Sep 2, 2026 5.2 MB TRUSTED v1.30 Dec 7, 2025 5.2 MB TRUSTED v1.28 Jul 17, 2025 5.2 MB TRUSTED v1.20 Aug 29, 2023 5.4 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 2, 2026.
Certificate issued to “Caerlaverock Software” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Sep 2, 2026
Validated against Google Play Sep 2, 2026
Signed byCN=Scott Maxwell, OU=Top Dude, O=Caerlaverock Software, L=Pasadena, ST=CA, C=US
Signing certificate (SHA-1)67:52:C9:D7:4D:58:BE:97:48:BE:69:A7:88:80:02:89:7D:7A:4F:C1
File MD5193eec54c05b01618f4f1c7472597e5b
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (8)

MarsClock requests 8 permissions, 1 of them sensitive.

Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
Foreground service special use android.permission.FOREGROUND_SERVICE_SPECIAL_USE
Prevent the device from sleeping android.permission.WAKE_LOCK
Request ignore battery optimizations android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Use exact alarm android.permission.USE_EXACT_ALARM
Wearable receive complication data (custom) com.google.android.wearable.permission.RECEIVE_COMPLICATION_DATA

Required hardware & features

Basic touch input android.hardware.faketouch

MarsClock APK: questions and answers

Is there a version of MarsClock for older Android phones?

The current version needs Android 6.0 or later. Version 1.20 is the newest listed build that installs on Android 4.4 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 1.20 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the MarsClock APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 193eec54c05b01618f4f1c7472597e5b.