This question is a long time coming I guess. I have been seeing claims in Android since the dark ages that our data is being backed-up to the cloud, and recently "Sync App Data" showed up as well in the account settings. However when I have to restore, all I get is the apps I had, and a very small restore.. perhaps wifi passwords and desktop wall paper from what I see. So my question is this..
Does the in built-in backup service work?
I see from code documentation, that the apps need to manage it manually. I guess then it is possible that some apps do not support this? Is this backup service actually supposed to backup app data or only just system data? Is installing helium or similar 3rd party services the only way to go?
Second minor question. Am I right in understanding that Helium and its adb backup bretheren rely on the opt in android service, and that Titanium backup and their ilk just copy all possible files of the app and thus do not require the opt in service?
p.s. Am sorry if there is a good post about these details, much of what I see is very cynical posts which plug one of the aforementioned 3rd party software.