Hi, as per subject, let say I have 10 apps(for my client) to be published, Should I create 1 release keystore per each app? Or can I use one release keystore only for all? what is the best practise. Thanks

In Android, you can create either a new keystore per app, or a new keystore that will serve only a group of apps and so on. It is up to you, entirely. From the technical standpoint of view, apps that are created with the same keystore will be able to work better together, as they will use the same space in the memory of the device. That may come as a moot advantage at best. Whatever you do, backup the app and its keystore together and in multiple places, on multiple hardware devices, drives, drop boxes... whatever have you. It would also be wise to give the keystore to your client as well, so that they will be able to take precautions on their own. Distribute the risk of losing the keystore, if you will.

@Dusko Thanks for that. So I believe best practise if you develop app for client is 1 keystore per app. cheers

@Dusko is right on, especially with the part about backing up your keystore. If you loose your keystore, or forget the password, you won't be able to update your app...ever. You'll have to submit and entirely new package. And there's no way around that. If the 10 apps are for a single client, I'd use 1 keystore. The keystore is literally and identification of who published the app. If it's the same person/organization, use the same keystore. If you are publishing 10 different apps for 10 different clients, then use 10 different keystores. Mark

Agree with Mark, one keystore per client would be best, regardless of the number of apps the client could have. It is entirely up to you, though.

Thanks @Mark & @Dusko. hope this info can help other newbie as well.