Will users be able to update app (which has been downloaded from different app, e.g. Mi Store) in Play Store (or vice verse)?

Question

Imagine, I have my app released in X Strore and Play Store . Then I release update in both of the stores. If user downloads my app from X Store before I release the update. Then, after I have updated, user goes to Play Store to update the app that has been downloaded from X Store.

Is this gonna work?

If yes, do I have to use the same signing keys for apk that I am going to distrubute to X Store and Play Store ?

Answer 1

It will work if the apk is signed by the same key. The first update may not be automatic, though.

An easy way to test this if you have an app already published to the play store is to manually install an older version of the apk to your phone with adb and then going to the play store to check for updates. The phone should not have the app already installed for this test.

It will be impossible to do if the signing keys are different. This is a security feature of Android, not of the distribution channel.