Keep up-to-date with space launches from NASA and other agencies around the world with MissionClock for your iPhone or iPod Touch.

MissionClock shows you a real-time countdown clock for upcoming missions, as well as information about missions that are currently underway. You can see major launch and ascent events as they happen, and receive alerts when mission conditions change.


• Gorgeous, at-a-glance countdown information
• T-clock and L-clock information
• Countdown holds
• Hold time remaining
• Current and significant event times displayed in multiple time zones
• Detailed mission event lists
• Time to/since each event

MissionClock’s main view shows the current time in three time zones (yours, UTC, and the mission’s). It shows the T-clock, including pauses for built-in launch holds, and the L-clock, letting you know how much real time remains before launch. For missions that have already launched, MissionClock will show you the Mission Elapsed Time (MET).

The MissionClock staff regularly compile space mission information from a variety of sources including contacts within NASA, and collect them on our servers. MissionClock is automatically updated with changes, so you stay informed.

What’s New

Version 1.1.4

This version fixes a bug that would cause duplication of certain mission events.

Ratings and Reviews

3.3 out of 5
7 Ratings

7 Ratings

simmy2109 ,

Okay but needs more frequent database updates

I really like the concept of the app. While the information isn't exactly presented in the prettiest format possible, there's lots of good timing information there, including specific events within the countdown and after liftoff. However, an app like this is made or broken by the quality and accuracy of its data. Right now, the upcoming TurkmenAlem satellite launch with Falcon 9 is listed as launching in a bit over two days from now. However, the date for this launch was pushed three days back, and this push was made several days ago. I don't expect instant updates, but this launch is the next one on the global manifest! Hopefully the author finds a way to more reliably keep the database in order, otherwise this app is useless.

Another recommendation to the developer... I would love a way to enter a clock view on the app where the main countdown dominates the screen. I think events would still deserve a spot somewhere, probably the mission name and maybe some other basic info too.... but clock dominating. Just put it on the wishlist. Glad someone finally made an app like this!

GoldenRetrieverOwner ,

Use caution. Info may not be current.

The last Mission Clock entry for SpaceX was wrong. That launch didn't occur for another week. And the current SpaceX launch event listed by Mission Clock is also wrong. That launch has been pushed back almost two weeks.

AlphaOne086 ,

App continuously crashes

I have not been able to get the app to stay open since iOS 11 deployment. I’ve tried uninstalling and reinstalling the app but click to open and it automatically crashes. :-(


Latency: Zero, LLC
4.1 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2009 - 2016 Latency: Zero, LLC. All rights reserved.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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