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Eric Griffin edited this page Jun 16, 2026 · 3 revisions

Submersion wiki

Submersion is a free, open-source dive log for scuba divers — one app for iOS, Android, macOS, Windows, and Linux. Your logbook lives on your own device, no account and no subscription required, and you can export all of it to open standards at any time.

Note

New here? Jump straight to Installation to get the app, then log your first dive with Your First Dive.

Why Submersion

  • You own your data. Every dive is stored locally on your device in a standard SQLite database. The app works fully offline, and there is no Submersion server in the middle.
  • No account, no lock-in. Use the app the moment you install it — no sign-up, no email, no tracking. Export your entire logbook to UDDF or CSV whenever you want and take it elsewhere.
  • Truly cross-platform. The same logbook, with the same details and analytics, runs on iOS, Android, macOS, Windows, and Linux. Optional, opt-in sync keeps your devices in step using cloud storage you control — see Multi-Device Sync.
  • Free and open-source, forever. Released under GPL-3.0. No premium tiers for core features, no ads.

The app at a glance

When you open Submersion you land on the Dashboard — your home screen, with a snapshot of your recent dives and quick ways into the rest of the app. From there, everything is organized into a few groups:

Group What lives here
Logging your dives The Dashboard, your dive log, dive profiles and decompression, dive computer downloads, and import and export.
Your dive world Dive sites and maps, trips, buddies and dive centers, and marine life and photos.
Diver and gear Your certifications and courses, your equipment and service reminders, and your diver profile.
Insights and planning Statistics and records across your diving, plus the dive planner and calculators.
Setup and data Settings, backup and restore, multi-device sync, and debug mode.

Tip

"Home" in the navigation always takes you back to the Dashboard.

Finding your way around

Submersion adapts its navigation to your screen size.

On a desktop or tablet (a window at least 800 px wide), a navigation rail runs down the left edge with all thirteen destinations:

Home · Dives · Sites · Trips · Equipment · Buddies · Dive Centers · Certifications · Courses · Statistics · Planning · Transfer · Settings

On a wide enough window the rail expands to show labels next to each icon, and you can collapse it back to icons only whenever you like.

On a phone (a window under 800 px wide), the rail is replaced by a bottom navigation bar with five slots: Home, three destinations of your choosing, and a More menu that holds everything else. By default the three middle slots are Dives, Sites, and Trips, and the remaining destinations live under More — but you can pick which destinations occupy those slots.

Tip

To change which three destinations sit in your phone's bottom bar, head to Settings. "Home" and "More" are fixed; the other slots are yours to arrange.

Note

Transfer is the hub for moving dives in and out: it covers dive computer downloads and import and export. On the navigation rail it appears as a single "Transfer" destination.

Start here

  1. Install Submersion on your platform of choice.
  2. Log your first dive — a five-minute walkthrough that sets up your diver profile and records a dive.
  3. Already have a logbook elsewhere? Bring it across with import and export.

Help and source

See also

Getting Started

Logging Your Dives

Your Dive World

Diver & Gear

Insights & Planning

Setup & Data

Reference

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