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

Yyzdude ,

Good app but notifications not working

Was using this app religiously until iOS 9.

The notifications don't work at all anymore. Even after deleting and restoring the app.

Once this is fixed I'd definitely give it a 5 *

Want to be Astronaut ,

Must have

This is for sure the best app that a space fan could ever have because it gives you launch updates current missions,past missions and has the T- clock along the L- with crew activities aborts and much more!


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

    Up to six family members will be able to use this app with Family Sharing enabled.

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