MissionClock 4+

Latency: Zero, LLC

Designed for iPad

    • $4.99



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 1.1.6

This minor update addresses some issues revealed in the last update:

• Enhancements across the app to better support Dark Mode as well as Dynamic Type.
• Larger text (where possible) in the Clocks tab and the bottom-edge clock banner.
• Override the system settings for Dark Mode (for example, if you normally prefer Light Mode but wanted MissionClock to be Dark).
• Fix a bug in how missions are selected for the Clocks tab.

Ratings and Reviews

3.8 out of 5
11 Ratings

11 Ratings

Gary LaPointe ,

Very Cool! More detail than you probably every need...

This is slick. All sorts of details. I was really hesitant to spend the $4.99 for it but I had heard that he specifically has to make changes by hand as NASA changes timelines.

This has PUSH alerts, that means you can get them even when not running the application. And it looks like it keeps track of the push alerts so you can view them later, which is very nice.

I'm a pretty techie guy but the info is pretty geeky even for me. It needs a "basic mode" for the less geeky, but interested people. (Honestly, I'd probably use that mode).

Two complaints:

1) Civilians don’t necessarily know when day 234 of the year is, an option to turn on “normal” dates would be awesome.

2) In the application, the mission clock pages needs to be linked to the missions page. Clicking the clock title (or something) should take me to the mission page for that mission and clicking the events at the bottom of a clock page should take me to all the events for that mission. They're all there already, they're just too many clicks away.

3) When I get an alert/message I want to be able to click on it and get the clock to quickly pop up. Sometimes the name in the alert doesn’t match the name in the list of missions.

There's info on past missions too. The only difference is the clocks aren't ticking....

Maybe some definitions for some of the information or links for more info on the launches (more than what's the overview page).

Links to NASA TV to watch? To stream audio?

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.

_albie ,

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. :-(

App Privacy

The developer, Latency: Zero, LLC, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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