Afterbeat Privacy Policy

What Afterbeat does

Afterbeat lets you manually record wrist-based rhythm sessions on Apple Watch. Its iPhone companion lets you review records and manage copies on that iPhone. No account is required.

Data used

During a session, Afterbeat processes wrist acceleration and rotation to estimate rhythm and duration. If you enable a workout session and permit access through Apple system controls, it can also use heart-rate samples and system activity-energy estimates. Heart-rate recovery observation may continue for approximately one minute after recording ends.

The app stores session summaries, sampled chart data, algorithm and data-source labels, preferences, and the small amount of sync state needed to transfer or delete records. Preferences include which of the recent closing lines were already used, so the same line is not repeated. High-frequency raw three-axis motion is not retained as a permanent recording. Optional diagnostic traces can be recorded in development builds.

Device storage and iPhone sync

Records are stored in the app containers on your devices. In version 1.0.2, iPhone sync is optional and requires you to enable it. The version 1.0.1 companion could receive history automatically after activation. When enabled, summaries and chart data move between your paired Apple devices using WatchConnectivity. Afterbeat does not operate a server that receives your session history.

You can turn sync off in the iPhone app. You can also turn sync off and clear current and previous phone copies. Clearing phone copies does not delete records on your watch or in Apple Health. Turning sync back on permits watch records to be copied to the iPhone again. Deletion requests you already made are retained for processing; clearing copies does not create a new request to delete watch or Health records.

When the watch data source changes, the app asks before replacing the current source and retains prior copies in a separate section. Interrupted file transfers may leave temporary fragments until they expire or phone sync is turned off.

App data files are marked to be excluded from system backups. This does not remove copies that may already exist in older device backups, or control Apple's own Health data storage and synchronization.

Apple Health

Enabling a workout session and saving a Workout to Apple Health are separate choices. In version 1.0.2, saving a Workout is off by default. Changes to this setting apply to new sessions. If saving is enabled, the saved Workout may include the recovery-observation period as well as the active recording.

Older versions could save Workouts when authorized. Afterbeat cannot identify every older Health workout from an app-history record. Where an exact association is unavailable, use Apple's Health app to manage those workouts.

Apple Watch may independently collect health data. Afterbeat's controls do not delete those independently collected samples or change Apple's system-wide Health settings.

Deleting records

You can request deletion of a current app record on either device. Deletion is synchronized to the other device when the connection and app are available. An offline device may still retain its prior copy until it receives the deletion.

Deleting an app record does not automatically delete an Apple Health workout. Where Afterbeat has an exact association, you can separately choose to delete that workout. The app shows pending or unsuccessful processing instead of claiming all copies are already deleted. A request is acknowledged only after the receiving app saves the change.

You can revoke HealthKit permissions using Apple system settings. Without an active workout session, this app limits recording to the foreground and ends the recording when its interface becomes inactive.

Sharing a session as an image

In version 1.0.3, the iPhone app can render one session into a shareable image. The image is drawn on your iPhone and is never generated or stored on a server. Afterbeat shows you the card before anything is shared, and passes it to Apple's system share sheet only after you choose to share.

The card contains the session's closing line and its measured rhythm, duration, active share, steadiness and, when real samples exist, peak heart rate. It does not contain a date, a session identifier, or device information unless you turn the date on yourself, and the date is then shown to the day rather than the time of day. Once you send the card to another app or person, what happens to it is governed by that destination, not by Afterbeat.

Data sharing and purpose

Afterbeat does not sell your health or motion data, use it for advertising, or require an account. Data is used to provide the recording, history, optional device sync and deletion features described here. Opening the support or privacy website uses your browser and an HTTPS connection; session records are not attached to those requests.

Afterbeat is not a medical application and does not provide diagnosis or treatment. Its movement and heart-rate summaries are not measurements of sexual function, physical fitness, or medical conditions.

Contact

For privacy questions, contact zhihao93.li@gmail.com. Do not send health records unless you intentionally choose to share them for a specific support request.