The official Crunchyroll app updates every two weeks to patch bugs and add new shows. A modded APK does not update automatically. You will constantly get the dreaded "Update Required" pop-up. You then have to go back to AndroForever, download a newer version, and reinstall—losing your watch history each time.
But here is the hard truth:
On a technical level, the version attempts to trick the Crunchyroll servers. When you hit "Play," the official app sends a request to Amazon Web Services (where Crunchyroll hosts videos) asking: "Does this user have a premium key?" crunchyroll apk mod - AndroForever