4. Account & synchronization

4.1 Your username

Open the menu and tap your user entry (it reads "No account" while signed out) to reach the User page. The "Username" field at its top is your display name — it is also your shooter name on result cards. You can change it at any time, with or without an account.

4.2 Using the app without an account

The app is fully usable without signing in. On first launch it creates a private device profile: sessions, series, shots and settings are recorded under that profile and synchronized to the cloud for safekeeping, but they are tied to this device installation.

You will want a Fastmark account when you need any of:

• the same data on several devices (phone + tablet, or a new phone);
• watching a series live from a second device (§4.5);
• sharing events with other account holders;
• supervisor mode (chapter 9) — supervisor access is granted to an account, so it requires one.

4.3 Signing in

Signing in uses a one-time code by email — there is no password.

1. On the User page (§4.1), enter your email address and tap "Send code" (requires internet).
2. Check your inbox and type the 6-digit code into the code boxes. The "Resend code" button re-sends it after a 60-second cooldown.
3. On success a blocking progress dialog — "Downloading your data…", with a circular progress indicator — covers the switch to the account's data. It cannot be dismissed and closes by itself when the download completes; the home screen then shows the account's history.

Signed-in accounts also get a "Shooter select" card on the User page with the "Show my code" button — the share code that lets another account add you as a shooter in their sessions (§9.3).

4.4 Deleting your account

"Delete" on the User page (requires internet) deletes your account, and the app returns to the device profile. Signing in with the same email address later starts a fresh, empty account — the deleted account's data is not recoverable.

4.5 Several devices — master and viewers

When a series runs, exactly one device is in charge:

• The device that starts a series is its master: it drives the targets, receives the shots, computes the scores, and owns the stop/next/replay controls.
• Every other device signed in to the same account (or subscribed to the same event) shows the series live, read-only: shots and scores appear as they are synchronized. Viewer devices keep their back arrow and have no stop button. Automatic opening: when a series starts in a session you can see — started from another of your devices, or by the owner of an event you are subscribed to — the app jumps to the live series screen by itself. It does so at most once per series: if you close the live view, it does not re-open for the same series. (In exclusive mode this is filtered to a single target — see §9.6.)

4.6 Offline first — how synchronization behaves

• Everything works offline: creating sessions, shooting, scoring, editing, notes. All data is written to the device instantly.
• Whenever a connection is available, changes upload in the background and other devices receive them. No user action is ever needed; there is no sync button and no "unsaved" state.
• Internet is required only for: the very first launch, signing in and out, deleting the account, and receiving data from other devices.

4.7 Supervisor access on your account

Supervisor access — the right to drive several shooters and several targets from one device — is granted by Fastmark on your account, together with the list of your registered targets. The "Supervisor mode" card on the User page shows the current status:

• "Valid until " while the access is active, or "No active subscription" without it;
• with access, an expandable "Registered targets: " list — one checkbox per registered target serial, used by exclusive mode (§9.6).

To obtain or extend supervisor access, contact Fastmark. Chapter 8 covers what it unlocks.