ISS Detector 4+

See the Space Station

Derk Vrijdag

    • 4.1 • 107 Ratings
    • Free
    • Offers In-App Purchases



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.

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 Starlink satellite trains, 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.
Starlink and Famous Objects: Track Starlink satellite trains, Hubble Space Telescope, rocket bodies, bright satellites and more.

What’s New

Version 2.6.2

- The NASA live video streams are working again.
- The augmented reality instructions are now translated correctly.

Ratings and Reviews

4.1 out of 5
107 Ratings

107 Ratings

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.

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 .

4happyhomes ,

Great App - is it Accurate?

I’ve been using this app for some time and really like it. I bought the amateur radio extension. I use it on a iPhone 12. I do have 2 concerns and would love a response from the development team…
1. There isn’t a “refresh” button on the iPhone version or a way to tell when the Kep data was last updated. How do I force an update or tell when it was last updated?
2. I’m finding that if I record (write down) satellite pass parameters from this app more than 24 hrs in advance they are grossly in error. For example, if I record the parameters for any satellite that will be passing over 2 days from now then wait 2 days and check ISS Detector again on that same pass, the parameters are all changed, and by a lot. Why can’t the app predict reasonably accurate passes a few days in advance?
Great app otherwise! 5 stars.

In-App Purchases

Comets and Planets
Find the Comets, planets and the moon
Combo package
All extensions, including future extensions
Starlink and Famous objects
Starlink and bright satellites
Amateur Radio Satellites
The amateur radio satellite collection.

App Privacy

The developer, Derk Vrijdag, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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