Your honest dive logbook.
On the Apple Watch you already own. DiveOne records depth, time, and water temperature, keeps your history exportable, and helps you find dive sites, centres, and liveaboards on neutral terms.
What you get
A logbook, not a promise machine. These are the things DiveOne is built around.
Log dives on your wrist
Depth, time, and water temperature recorded during the dive using Apple Watch Ultra's built-in sensors. Works offline; syncs to iPhone after surfacing.
Own your history
Your logbook is a training record and trip history. It stays on your devices and stays inspectable — not trapped behind an opaque sync or a subscription wall.
Export anytime
Your whole logbook stays portable. Leaving should always be possible — that is the point of an honest logbook.
Find sites, centres, and boats
A neutral directory of dive sites, dive centers, and liveaboards. Listings are non-ranked; order defaults to neutral criteria.
What DiveOne is not
Boundaries stated up front, so trust does not rest on fine print.
Go deeper
Two questions divers ask most, answered on their own pages.
Download DiveOne 1.0.
DiveOne 1.0 is available on the App Store. The email subscription now carries version and validation updates.
DiveOne is a recreational dive tracking and logbook tool. It is not a dive computer and does not replace professional diving equipment. Always dive within your training and certification limits.
DiveOne 1.0.1 is available.
Download the current App Store release and check the status page for verified limits.