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International Space Station allows to see the position of the International Space Station over a movable zoomable map of the world,

Calculation of the position is very accurate, the app uses the latest NASA code to calculate it. The route path is visualized over the map to evaluate if the station is coming near your position (when meteorological and light condition are adequate you can see it without any instruments)

The app downloads at regular time from our server the latest orbital parameters to calculate the orbit, so the calculation obtained for the position is always accurate and perfect. No user action required. We more...

What's New

Version 1.2:
  • Extended orbit track prevision (from 1 to 8 hours)
  • Better internal management of NASA orbital data
  • Improved map drawing
  • Improved map refresh
  • Optional full screen window
  • Sandbox release
  • Internal engine calculation improvements
  • Bug fixes


  • OS X 10.8 or later

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International Space Station User Discussion

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Ythara Member IconComment+52

or simply go to http://www.nasa.gov/mission_pages/station and watch the same webcam and tracker for free.

Reply7 replies
Version 1.0
Tension Software (Developer)

Nasa web tracker is updated at interval of thousands of Miles (or Kilometers). This app offers precise position second by second and if you want to see the station in the sky (it is the brighter star in the sky) it is a lot better plus offers ISS inner web cam with one click.
Plus this app offers day by day orbital data update for a perfect calculation, a things a lot of other apps around don't do (and if orbital data are not up to date calculation of position is wrong).
This app wraps in a easy to use interface a true orbital calculation engine for perfect and exact computation, it doesn't grab the position from the web (often a wrong one) all this at almost a free price (US$ 2.99)


What is it these days with this "free culture"? Developers have to work day and night to provide you with software to enjoy - if you don't enjoy it, don't use it.

Keep up the good work Tension Software. There will always be moaners.


While I agree in a lot of cases, but in this instance I already paid for it through my tax dollars so I should not have to pay again to see my tac dollars at work nor should someone else profit from something that takes advantage of someone else's work without compensating them for it - i.e. NASA

Tension Software (Developer)

Jimw we are not profiting from NASA work, the algorithm and formula to make satellite calculation were put on public domain by the authors which are independent scientists even if they probably worked in the past for NASA.
Other formula such as the one for converting from celestial coordinate to terrestrial one are from U.S. Naval Observatory, but these too put as public domain from them.

So for computation we use general available algorithm. Saying we profit from their work without compensating them is absolutely unfair, because in the license agreement they said in an explicit way they don't ask for money but just for giving credit to them and we did it in all the documentation included with the app.

When you put an algorithm online for public use you agree to do not receive money back, even if the research to develop these algorithms was made with public money.

I notice that often here on Macupdate someone uses just generic excuses to say all the worst about published software, and often it becomes pathetic.

Our software required days and nights of works and is one of the best for precision of the position of the ISS and offers an unique way to have always the last orbital data in use and we offer it for the ridiculous price of US$ 2.99 and what we obtained is fortunately a lot of satisfied users (and some idiotic comment too about tax paid to run NASA)


@Jimw, you didn't pay for this app with your tax dollars, and the dev has to pay taxes also!

This info is free on NASA's site, but having it in an app is not.

Plus tax dollars means nothing. I pay for street signs with my tax dollars, but does that mean I own them? Try taking one home and see!


I'm not personally that interested in NASA stuff that much, and not being from the US I can't comment on the Tax argument, but it's clear that the dev has put a lot of work into this app, so getting it for the price of a cup of coffee seems perfectly reasonable to me. Some people are just tight arses - You wonder what they must be like in real life, wandering about all day griping about paying small amounts for this and that. Must get very tiring...


Absolutely correct Ythara. This claims it allows you to "Watch the webcam stream from the International Space Station."

But is only gives an overpass map of the Earth and for anything else you have to use your Web browser to various dedicated area to:
Page Station at NASA
Web Cam stream on board of the station
Audio stream from the station
Facebook page of the station
Twitter presence
YouTube presence
Flickr presence
Support via email to all the users

So I say go to the site you recommended for FREE using your browser. This is misleading and deceitful advertising.

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Current Version (1.x)


Downloads 998
Version Downloads 219
License Commercial
Date 19 Jan 2014
Platform Intel 64 / OS X
Price $2.99