Where do alpha testers download Google Play Android apps?

Question

I have developed my app and have published it through Google Play for alpha testing. As one of the testers I get an opt-in link, where I signed in as a tester. After that I

Answer 1

Under APK/ALPHA TESTING/MANAGE TESTERS you find:

Choose the method you want. Then you need to first upload your Apk. Before it can be published you need to go to the usual steps in publishing which means: you need icons, the FSK ratings, screenshots etc.

After you added it you click on publish.

You find the link for your testers at: