Deploy system on many devices for testing?

Question

Android

Welcome all.
There are N devices on Android and M devices on iOS. Devices can be with different people, in different places. I would like to have a system for deploying new versions of programs to all these devices so that people can test them. Ideally, the server part is the same for Android and iOS.
For example:

1. Developed HelloWorld 2.0 on Android
   
2. Collected apk
   
3. Uploaded to the server
   
4. Pressed "send"
   
5. ???
   
6. Profit!
   

Who will advise what? Feedback on the options below are also welcome
. Options:

• testflightapp.com/ - iOS only. Android is expected later;
  
• Google Play alpha/beta testing - Android only =) ;
  
• hockeykit.net/ - googled it myself. iOS, Android.
  

Answer 1

testflightapp.com

Answer 2

Used to use testflightapp.com/ , then switched to hockeyapp.net/ due to slowdowns . Hockeyapp has a native Android app, while testflightapp has just a WebView that opens the site every other time. Hockeyapp also has a more convenient system for uploading builds.

Answer 3

testflightapp.com already has an sdk for android, only it is available via the link that will be in the email.