Every dive, enriched and worth returning to — reef science, your photos color-true, the marine life you saw, the place as it actually was that day. One record you'll open again.
Coming from MacDive? A high-fidelity import — your dives, your photos, your dive-computer profiles →
Not just depth and time. Your dive computer data, GPS track, weather, reef ecology, photos, and marine life — unified in one record, beautifully presented.
A trip is a journey ("Solomon Islands 2024"). A location is a place ("Tulagi Harbour"). A site is a single dive spot ("USS Aaron Ward"). DeepSix tracks all three independently and lets you browse history at whatever altitude makes sense — the whole trip, every dive in a particular harbour, or every dive that ever touched a specific shipwreck.
We haven't seen another dive log model the middle layer.
The reasons you'll open a dive again.
Why it all comes together — many sources, one record.
The groundwork: correct, portable, and quietly dependable.
In active development — not shipped yet.
iPhone, iPad, Apple TV, and Mac — all sharing the same dive via CloudKit. Curated photos stream to your TV automatically.
Shearwater doesn't auto-sync time. Your camera clock drifts. Your Apple Watch is GPS-disciplined to the millisecond. DeepSix reads the offset from each source on BLE connect, corrects historical dive timestamps, and aligns everything — so your photos land exactly where they belong on the profile.
A high-fidelity MacDive import — your dives, notes, gas mixes, buddies, and equipment records. Direct BLE download across 12 transport families, plus wired USB/serial import on the Mac — both built on libdivecomputer, so if your computer speaks Bluetooth or a cable, DeepSix probably speaks to it, and a new model typically lands within days of a tester's diagnostic. Even photograph your old paper logbook — AI reads the fields.
UDDF and Subsurface export is always free — and so are full lossless backup and the open .deepsixarchive format. DeepSix contributes a deepsix: XML namespace to UDDF for GPS coordinates and clock reconciliation, proposed for upstream inclusion in the standard.
DeepSix started when a trusted dive log stalled and our records felt stranded. So we built the thing we wanted — a small, independent team of divers scattered across the world, with contributors who brought deco, multi-gas, CCR, and cave diving to a project that began on the reef.
The throughline has never changed: your dives are yours. Relive them, learn from them, and take them with you whenever you like — your dive log will outlive any app, including ours.
The whole app. No dive cap, no feature gates, no nag screens. Log one dive or ten thousand — it costs you nothing.
Patron tiers — Plankton, Whale, and Megalodon — are optional support for the project. They include high-accuracy WorldTides tides as a thank-you, and nothing else; the names are the only joke. Prices appear in the app and on the App Store in your local currency. Read the pricing philosophy →
Download on the App Store → Testers: TestFlight →DeepSix is built on open data, open-source software, and the divers who came before us. MacDive in particular set the standard for a thoughtful Mac dive log, and its database format was our first import target and a key source of real-world test data — we're grateful for everything it made possible.
See the full acknowledgements →Chat isn't live yet.
Email [email protected] or find us on Discord — we respond to every message.
Thanks — we'll follow up.
