DISCLAIMER: hazard warning
Some Android apps may have specific hardware requirements, meaning they are not available for all devices. The main purpose of DummyDroid is to allow you to spoof a compatible device profile. However, you will likely have to experiment a bit since app developers rarely publish the system requirements of their apps.
Every time you make changes in the *Device Datasheet” box (and have the “register a new GSF ID” checkbox checked), pressing the submit button will cause DummyDroid to upload a new device profile into your Google account. Those profiles can not be deleted again (only hidden). Make sure to only use accounts, you don’t mind having lots of devices bound to.