App developers have control of what data is backed up for each app. Apple provides guidelines. See
here.
Quote:
Everything in your app’s home directory is backed up, with the exception of the application bundle itself, the caches directory, and temp directory.
...
Only documents and other data that is user-generated, or that cannot otherwise be recreated by your application, should be stored in the <Application_Home>/Documents directory and will be automatically backed up by iCloud.
Data that can be downloaded again or regenerated should be stored in the <Application_Home>/Library/Caches directory. Examples of files you should put in the Caches directory include database cache files and downloadable content, such as that used by magazine, newspaper, and map applications.
|