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Mars-Clock

Mars-Clock

Timekeeping for Mars Missions

2 ratings
2 reviews
📚 Education
🔧 Utilities

Archived App (Last seen on 12 May 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated

Features

Developer

SunlightAndTime
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Mars-Clock screenshot #1 for iPhone
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About

Track real-time NASA Mars mission data, including sols, local solar time, sunrise/sunset, and Earth-Mars distance. This educational tool provides an informative and easy-to-read display of active missions like Curiosity, InSight, and Perseverance.

✓Mission Sol tracking
✓Local Mean Solar Time (LMST)
✓Sunrise/sunset times
✓Coordinated Mars Time (MTC)
✓Earth-Mars distance
✓Radio signal delay
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What's New in Mars

1.6

September 30, 2021

Version 1.6 - Update for iOS 15 and WatchOS 8

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User reviews

Most RecentHighest RatedLowest Rated

Great

In app swipe the mission box to move to the next one. Love the app and thanks for keeping it up to date.
Aquarii832Aquarii832

Can’t switch between mission clocks

Please make it possible to switch between mission clocks in app as well. It does not state this for the app, only for iWatch it appears.

Otherwise grateful for the attempt to make this app possible.
SloneAKSloneAK

Response from developer

Sorry you are having trouble with the app. Switching between mission displays is different for the iPhone and the Apple Watch. On the phone you swipe left/right in the box at the top of the screen. On the watch you do a long press on the mission time. Click on the"I" button next to the app title at the top of the phone for additional information. I apologize for any confusion using the app.

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FAQ

What is Mars-Clock?

Mars-Clock is a paid utility app that displays real-time data from active NASA Mars missions. It provides information such as mission sols, local solar time, and the distance between Earth and Mars.

What active Mars missions does Mars-Clock track?

Mars-Clock currently tracks data for the Curiosity Rover, InSight Lander, and Perseverance Rover missions on Mars.

What kind of time data does Mars-Clock provide?

Mars-Clock provides Mission Sol (elapsed time in Sols), Local Mean Solar Time (LMST), Local True Solar Time (LTST), and Coordinated Mars Time (MTC), analogous to UTC on Earth.

How does Mars-Clock display Earth-Mars distance?

The app shows the real-time distance between Earth and Mars in miles or kilometers. The display color indicates whether the distance is increasing (red) or decreasing (blue).

What devices does Mars-Clock support?

Mars-Clock is supported on Apple Watch, iPhone, and iPod devices.

How often is Mars-Clock updated?

The latest version of Mars-Clock is 1.6, which was last updated on September 30, 2021. This suggests a relatively infrequent update cycle.

What is the user rating for Mars-Clock?

Mars-Clock has a rating of 3.5 stars based on 2 user ratings, indicating mixed user sentiment.

Does Mars-Clock have ads?

No, Mars-Clock does not contain advertisements. It is a paid application with no in-app purchases or ads.