DiveOne

DiveOne is a local-first dive logbook for iPhone and supported Apple Watch models. Native depth recording on the watch is limited to 6 m. Record and review unlimited dives for free. No account is required, and your data stays yours. Import completed underwater workouts and depth data from Apple Health with your permission. Export a CSV dive summary or keep a DiveOne JSON backup. Apple Health access is optional. DiveOne is a dive logger and logbook, not a dive computer. It does not provide decompression, no-decompression limits, ascent-rate or safety-stop guidance. Always dive with your own independently certified dive computer, training and local procedures. Account features are optional, and cloud sync is disabled in this release.