Background
I wish to store and restore some settings and other values for an app i'm working on.
The problem
As it turns out, Android already has a nice feature called "BackupAgent".
However, it also seems it's not supported on all devices:
Data backup is not guaranteed to be available on all Android-powered devices
it's not an API issue (though it is supported only from 2.2), but a manufacturer/carrier issue:
The backup transport is the client-side component of Android's backup framework, which is customizable by the device manufacturer and service provider. The backup transport may differ from device to device and which backup transport is available on any given device is transparent to your application. The Backup Manager APIs isolate your application from the actual backup transport available on a given device—your application communicates with the Backup Manager through a fixed set of APIs, regardless of the underlying transport.
The question
Is there another free alternative to store & restore data on Android into the cloud?