Know the data boundary
Fastly stores sessions, journal fields, and settings on the device. This release does not require an account and does not keep a custom-server copy of your fasting records.
Use the supported file workflow
Use the timer and History without a sign-in flow. If you want a separate copy of the ledger, export a JSON backup yourself and choose where that file is saved.
Backup export includes the current session when present, completed history, archived sessions, journal fields, protocol, goal, and supported settings. It is readable JSON, so store the file in a destination whose access you understand.
Check the copy you actually have
Local-only means a new phone cannot simply log in and fetch your history. Changing devices requires a backup you exported and a deliberate replacement import on the destination.
| Check | Practical meaning |
|---|---|
| Normal record storage | On this device |
| Device change | Export and import your copy |
Manage each retained copy
Privacy and recoverability are separate questions. Keeping data local limits the app's server involvement, but it also makes your own backup choices important.
Import replaces the current local dataset rather than merging it. Export first if you want to retain the current copy, and review the file date before confirming Replace local records.
A worked walkthrough
Imagine using Fastly for several months and then opening it on a newly installed device. The new installation does not know the old ledger merely because the same person owns both phones. There is no account identity that retrieves those records from a custom server. A manual JSON export from the old device is the bridge: save the file, import it deliberately on the new one, and verify its contents before removing the source. If you choose a cloud folder as the export destination, that file is now subject to that destination's storage and access rules. This does not turn normal app usage into continuous cloud synchronization. Keeping the distinction clear helps answer two separate questions: where the app keeps records during everyday use, and where you have deliberately placed additional copies for portability or recovery.
Fastly is a lifestyle timer and journal. These notes explain the app and offer reflection prompts. They are not medical advice or a prescribed eating schedule.