ISS Locator uses your current location to determine when the International Space Station will pass over. The iPhone magnetometer is used to indicate which direction to look. The iphone gyroscope is used to indicate the altitude on the horizon where the ISS will appear. A countdown lets you know exactly when the sighting will begin as well as how long it will last. Sightings can added to the calendar or a notification can be set. An email describing the sighting can be sent to a friend.

ISS Locator is a great educational tool and a lot of fun to use.

Note: Location services MUST be enabled for this app to function. Please enable location services for ISS Locator in your Settings app.

Note: Only visible sightings are reported. Visible sightings happen at dawn and dusk. You can not see the ISS or any satellite in daylight or in total darkness.

Note: The Hubble Space Telescope orbit is tilted to the equator at an angle of 28.5 degrees, which means that it never travels farther north than 28.5 degrees N. latitude (the latitude of Cape Canaveral, Florida), or farther south than 28.5 degrees S. latitude (the approximate latitude of Brisbane, Australia).

Please rate this app if you like it.

What’s New

Version 5.0

Updated objects.
Updated info.
Free additional sightings.

Ratings and Reviews

3.7 out of 5
3 Ratings

3 Ratings

410158 ,

Working again!!!

Better than other ISS locator apps. Simplicity and elegance.

Wuebben Design ,

NOT for iPad

iPhone app. Not very valuable for iPad users.

AstroPaul ,

BROKEN!! Solid design, could be one if the best with a couple of changes!

No longer working!

Two big issues right off the bat-- it forces you to calibrate the compass on launch--a nuisance as one usually just wants to know what's up! The compass calibration should be required only when the user wants pointing help--NOT on launch!

Next, it requires that Location Services be on! It won't remember your location between sessions. That's ridiculous! Many of us don't want to keep Location Services on all the time -- and most astro apps learn your location and remember it! But not ISS Locator. I've deleted it, sad to say!

Prior Review

Four improvements needed!

1. Bold the time, so that it stands out in the main list of passes.

2. Improve the display of specific passes. You should not have to tap to get the altitude and direction for each part--begin, max, or ends. That should be on one line for each of them. (There's no standard 12-hour time for max or end.)

3. Once it's learned your location, you should NOT need to have location services on! Other ISS apps remember your location and can still update passes.

4. Nor should you have to have wi-fi on to see the passes already downloaded!

Other than that, the app has great potential-- and its payment model--add another satellite Hubble e.g. for 99 cents is a decent one, although it has only 4 and no Iridium ones.


will lyons
7 MB

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



Age Rating
In-App Purchases
  1. Tiangong 1 $0.99
  2. Hubble Space Telescope $0.99
  3. X-37B $0.99


  • Family Sharing

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

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