Do you own both PC and Android versions of Stardew Valley, and always wanted to continue playing on one device from were you left of on the other?
Stardew Sync is a Stardew Valley save game manager. It allows you to upload your saves to the cloud, and then download it on other devices. So you can start playing on PC, and then continue playing on Android from where you left off, and vice-versa.
Stardew Sync also serves as a backup for your save games, so if you lose or delete your saves, you're still able to recover them on Stardew Sync.