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2022-01-07:  APP 1.083 has been released !!!

1.083 Windows 64bits download

1.083 MacOS 64bits download

1.083 Linux DEB-64bits download

1.083 Linux RPM 64bits download

  • new Star Reducer Tool
  • 15-30% speed increase in processing
  • introducing Comet registration
  • support for new camera models like Canon EOS R5,R6
  • Greatly improved HSL Selective Color Tool
  • New Batch Tools
  • New File Saver Module with PNG support

[Solved] Can APP be used on different computers?  


White Dwarf Customer
Joined: 5 years ago
Posts: 15
July 3, 2017 04:19  


If I purchase an owners licence, can I install APP on several computers I own?

For example, as I live in a light polluted place, I often take a scope and laptop for a couple of days to a dark sky sight where I would want to do some processing during the day. At home I use a desktop with a big 27" screen. Am I free to install and activate on both computers? Is there any restriction on this? - I use Sequence Generator Pro for example and I am allowed to install it on 3 computers.



Quasar Admin
Joined: 5 years ago
Posts: 2893
July 3, 2017 09:06  

Hi Gary,

Yes you can 😉

You can install APP on 3 separate computers. You can try it with the TRIAL license, it works on 3 computers as well.

With the new security system introduced in version 1.047, APP can be started and used offline as well, so without an active connection to the internet 😉

You need to activate the license on a computer online, so that the license file can be created on your computer. Then after activation, you can simply start and work with APP without an internet connection during your travels.

Let me know if you have more questions,



p.s. I made this a sticky 😉

Molecular Cloud Customer
Joined: 4 years ago
Posts: 5
April 2, 2018 13:40  

Can a license be removed from a computer so APP can be activated on another computer?
Example. If I have a laptop, a desktop and a virtual machine each with a license (as 3 are allowed).

If I buy a new laptop and stop using old one for APP, can I deactivate license on old laptop so I can use APP on new laptop?

I guess if my equipment was stolen/lost/destroyed I will need to purchase a new license as I would be unable to deactivate old licenses?


Quasar Admin
Joined: 5 years ago
Posts: 2893
April 9, 2018 23:12  

Hi @nharvie,

Thank you for your question and welcome to the APP forum 😉

Yes it surely can. You will have to contact me to do this currently. It's no problem 😉 The license is for 3 computers, not for the 3 first activated computers.

In a future APP version, you will be able to control the activated computers yourself using the CFG (configuration) menu. Then contact with me won't be needed and it will work immediately.

Let me know if this answers your concern 😉



Hydrogen Atom Customer
Joined: 3 years ago
Posts: 1
October 19, 2019 10:12  



I'm working together with another astro friend and I have bought the APP application.

I'm allowed to install APP on 3 computers, but when I'm installing APP on his computer is he allowed to work with APP or does he have to buy his own licences ?

Kind Regards,


Quasar Admin
Joined: 5 years ago
Posts: 4180
October 19, 2019 11:54  

The licenses are individual indeed, individuals can use 3 computers (like on a processing PC and a laptop in the field, those kind of cases). Different individuals would need their own license.