Your data, your control.

Recent sessions and active tracking data.

The primary local logbook and session history.

Optional underwater workouts and import data, only with your permission.

From version 1.0.2 (version 1.0.1 has none). Optional and on by default only after a first-open disclosure. You can continue with it off or disable it later. Bounded first-party interactions and coarse reliability outcomes use a random app-installation ID that is not derived from a device or advertising identifier and is not linked to your account, identity, or dive data, including Health values. Raw events and restricted redacted diagnostics are kept for at most 90 days, identifier-free daily counts for at most 24 months, and turning analytics off clears the iPhone and Watch queues and requests deletion of the raw events.

With explicit consent, the name, dates, interest, and message you enter are stored privately for the selected managed operator. When you continue, the same fields are passed to WhatsApp to prefill a message; the operator receives them through WhatsApp only if you send that message. The request address is used transiently for an in-memory one-hour abuse limit and is not stored with the inquiry. The two pilot pages use first-party view and submission counters only; third-party analytics and advertising trackers are suppressed on those pages and in the account area that displays the private operator inbox.

When you sign in, your account information and profile are stored for account features. In 1.0.1, signing in may copy your logbook and attached photos to DiveOne servers. This is off from version 1.0.2.

Dives you add or import on the website (diveoneclub.com/account) are stored on DiveOne servers in your account. Imported dives are labelled and read-only. Reconstructed estimates are excluded from the logbook totals. The app does not sync with the website logbook.