Amazon has taken aim at Apple with its Game Circle. Previously only gamers with Amazon Kindle tablets could compete amongst themselves. Now Amazon’s proprietary GameCircle platform is now open to all Android devices. The backend cloud service has offered up leader boards, achievements and progress saves to Kindle tablet users but now it supports all android tablets.

However, it still involves developers integrating the new code into their games. This also comes when Google launched its own Google Play Games Services.

At the moment Apple owns the Game Center, but how long before the others catch up. And will Amazon be able to upset Google’s apple cart?