Have you seen the International Space Station? It is visible with the naked eye!
This is the easiest way to spot the station.
ISS Detector will tell you when and where to look for the ISS. You get an alarm a few minutes before a pass. You will never miss it. ISS Detector will also check if the weather conditions are right. A clear sky is perfect for spotting. The Chinese space station Tiangong 2 are also tracked.

Extensions will enhance the functionality of ISS Detector. With an in-app purchase you can add many famous satellites and amateur radio satellites. See the Hubble space telescope, rocket bodies, Vanguard 1 and many bright satellites.

Available Extensions (in-app purchase):
Radio Amateur Satellites: Track dozens of ham and weather satellites.
Famous Objects: Track Hubble Space Telescope, rocket bodies, bight satellites and more.

What’s New

Version 1.5.2

Fixed a problem with notifications for Amateur Radio satellites and Famous Objects. They did not work correctly on some devices.

Ratings and Reviews

4.1 out of 5
43 Ratings

43 Ratings

NohrSolo ,

Only what a field Amateur needs

Filters are great to get a list of just what an amateur radio operator would want. Or for an ISS observer only interested in high striking passes. Or filter on the low to zero elevation passes if you like.
Another source, or past experience, is needed to know which AMSATs are actually active. Lots of them are still on orbit but long since inactive. Once an Active list is made, a manageable list is produced.
What is really nice is just the information an Amateur needs for field work. Details on the pass, ground track map, and the Modes, Uplink and Downlink frequencies come up with one click on the satellite of interest. More than that is far too much data unless already stationed at a ground base with computer tracking decoders...etc.
Virtual reality will be interesting to test. I can see it being useful as a pointer. How to place the phone in an already equipment-busy setup is yet to be seen. As far as the screen closing, that is more of a Phone screen saver issue than the app. The phone will blank the screen on every app I’ve used unless you tap it every 30 seconds .

P41E ,

Suggestion to keep app working while in use.

Hi. I am a Ham Radio operator and i have been using this great app for about a year to predict and work amateur satelites. The only frustrating part is that the app keeps closing while working the sats. Other than that it works great and it's my preferred app for the job. Working sats is a bit of a difficult task because you need both hands to hold the antenna and the radio. I suggest keeping it open while using to make it easier for the hams that use it. I hope you can do something about this situation and you will get 5stars.
Thanks for your time.

Thatsingerfromthatband ,

Love this app

As an amateur radio operator I find this app very useful. So useful, in fact, that I have had it on several phones and tablets over the years. It's great for sitting out in the yard with a nice cigar and enjoying the night sky.

The only improvement that I can think of would be to add the uplink/downlink frequencies and modes for the amateur satellites. If I had that information this would be the only app that I use for satellites.

In-App Purchases

Combo package
All extensions, including future extensions
Famous objects
The famous objects collection
Amateur Radio Satellites
The amateur radio satellite collection.


Derk Vrijdag
25.3 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Dutch, German, Spanish

Age Rating
In-App Purchases
  1. Famous objects $0.99
  2. Amateur Radio Satellites $0.99
  3. Combo package $1.99


  • Family Sharing

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

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