To backup Fasting Time data, you need to use the Cloud Sync feature.
1. Tap the main menu button and tap the Cloud Sync.
2. Sign up using either Google, Apple, or Email authentication.
3. After signing up on the Cloud sync page, you can enable the automatic backup. You can also manually save your data by using the slots.
Note: Manually backup data using slots are not used to auto backup your data. They are stored as it is unless you replace them.