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  • Submersion Dive Log screenshot 1
  • Submersion Dive Log screenshot 2
  • Submersion Dive Log screenshot 3
  • Submersion Dive Log screenshot 4

About Submersion Dive Log

Submersion is a comprehensive, open-source dive log for recreational and technical divers. Track dives, manage gear, analyze trends, and export to open formats. No subscriptions, no proprietary lock-in, no cost. COMPLETE DIVE LOGGING • Log unlimited dives with depth, duration, temperature, and conditions • Track entry/exit times with automatic surface interval calculation • Rate dives, add notes, and organize with custom tags • Record visibility, current, waves, weather, and water type • Support for 20+ dive types including night, wreck, cave, and technical DIVE COMPUTER INTEGRATION • Connect via Bluetooth or USB to well known dive computer models • Import dive profiles with one tap—no cables to your computer needed • Smart duplicate detection prevents importing the same dive twice • Supported brands: Shearwater, Suunto, Mares, Aqualung, Garmin, Oceanic, and many more ADVANCED PROFILE ANALYSIS • Interactive depth/temperature charts with zoom and pan • Bühlmann ZH-L16C decompression algorithm with gradient factors • Real-time NDL, ceiling, and tissue loading visualization • Ascent rate monitoring with color-coded warnings • O₂ toxicity tracking (CNS%, OTU, ppO₂) for nitrox and trimix divers • SAC/RMV calculation and trend analysis TECHNICAL DIVING READY • Multi-tank support with unlimited cylinders per dive • Full gas mix tracking: Air, Nitrox, Trimix, and pure O₂ • Gas switch markers on dive profiles • MOD, END, and EAD calculations built-in • Tank presets for quick logging (AL80, HP100, Steel 12L, and more) GEAR & EQUIPMENT MANAGEMENT • Track all your gear: regulators, BCDs, computers, suits, and more • Service history with reminders when maintenance is due • Create equipment sets for different diving configurations • Weight calculator based on exposure suit and conditions DIVE SITES & MAPS • Build your personal dive site database with GPS coordinates • Interactive map with clustered markers showing all your sites • Capture location from your phone or pick from the map • Automatic reverse geocoding fills in country and region • Track site details: depth range, difficulty, hazards, and access notes MARINE LIFE TRACKING • Log species sightings with counts on each dive • Pre-loaded database with common species • Build your personal life list over time BUDDIES & CERTIFICATIONS • Manage your dive buddy list with certification levels • Track your own certifications with expiry reminders • Associate buddies and instructors with each dive • Log dive centers and boat names STATISTICS & INSIGHTS • Total dives, bottom time, and depth records • SAC trends over months and years • Temperature preferences by season • Dive frequency charts and gas mix distribution • Deepest, longest, coldest, and warmest dive records CLOUD SYNC & BACKUP • Sync across all your devices via iCloud or Google Drive • Local-first design works completely offline • Export to UDDF, CSV, or PDF • Import from other dive log apps PRIVACY FOCUSED • No account required—start logging immediately • Your data stays on your device (unless you enable cloud sync) • No ads, no tracking, no subscriptions • Open source: inspect the code yourself on GitHub Whether you're a new diver logging your first open water dives or a technical diver tracking complex trimix profiles, Submersion adapts to your needs. Join the growing group of divers who trust Submersion to preserve their dive information. Questions or feedback? Visit our GitHub repository.

Ratings & reviews

4.5

11 ratings

5 ★ 82% 4 ★ 0% 3 ★ 9% 2 ★ 9% 1 ★ 0%

What’s new

Version 1.8.0 · Updated September 24, 2026

## 1.8.0 (2026-09-24) ### Features - replace the story's stacked map and day header with one band (#2233) - copy each Play beta onto the closed testing track (#2290) - plot each CCR O2 cell as its own curve (#854) (#2277) - Diving Log / DiveLogDT relational tables (phase 2) (#2247) - send betas to the open testing track (#2273) - one gear service chip per severity, opening a filtered list (#2259) - log a dive for a buddy's profile and fill planned dives from a download (#2040) - media log category, peer device names and the media health report (#2150) - zoom-dependent level of detail for bathymetry 3D terrain (#2167) - replace country/region filters with searchable dropdowns (#2147) - Diving Log / DiveLogDT SQLite logbook import (phase 1) (#2198) - classify a Subsurface cave dive as a cave dive (#2205) - drop the personal stat fields and difficulty from site list cards (#2199) - open Site Details on the map and the site's name (#2183) - name rail items in a tooltip while labels are hidden (#2170) - drop Retire/Reactivate from the detail overflow menu (#2155) - favorite a buddy from the Dive Partners list and detail page (#2146) - narrow service type list, cap history, show used value (#2142) - remember what worked with an operator's rental gear (#2087) - drop the trip header stripe and let a trip collapse while its dive is open (#2043) - tell identical gear apart in every list (#2052) - carry equipment tags through UDDF and CSV (equipment tags 4/4) (#1966) - move the profile image export into the Export sheet (#2011) - edit, show, filter, search and bulk-edit equipment tags (equipment tags 3/4) (#1965) - schema v219, equipment tag scope and sync (equipment tags 2/4) (#1964) - switch diver profiles from the hero header avatar (#1994) - remove the View Site chip from the dive details hero card (#1992) - drop the replan icon from the profile chart header (#1975) - make the schema-mismatch screen readable (#1946) ### Bug Fixes - make the list header title the Equipment/Sets switcher (#2257) - a gallery miss is notFound only on the device that linked it (#2296) - deleting a diver cascades their media like the single-entity deletes (#2289) - thinner profile chart lines, cursor-following tooltip, dynamic axis scaling (#2251) - a Diving Log dive that loses its site says so (#2295) - the Diving Log mappers satisfy the site location contract (#2293) - keep a dive's location when it has no named site (#2264) - a failed transfer says what the provider actually said (#2246) - quiet verification, and the enrichment a dive deletion takes with it (#2239) - show the tint a tag displays, in the app and in Settings (#2270) - merge pending rows, guard stale media copies, and clock media's facts (#2171) - keep the solid light fill for alert only (#2284) - show a tag in its own colour, not a tint of it (#2255) - label Tomorrow by calendar date, not 24 elapsed hours (#2243) - suppress the end-pressure check the series cannot corroborate (#2238) - match the ice dive type keyword as a word (#2236) - stop flagging pressure endpoints the surfacing tail already explains (#2225) - count trip days as calendar days, not elapsed hours (#2217) - scale the 3D site terrain's depth realistically, with a per-site override (#2165) - stop the total service cost from showing its currency twice (#2227) - remove automatic deco-based dive type classification (#2226) - refresh dive counts when a buddy is linked via dive_buddies alone (#2168) - keep a dive type the importers do not recognise (#2215) - localise the next-trip card countdown (#2219) - carry site features through UDDF and fix the lossy sites CSV (#2206) - read the dive site a pre-4.5 Subsurface export keeps inline (#2208) - declare READ_CONTACTS so contact import can run (#2192) - follow the playback cursor in the fullscreen readout (#2182) - offer real ways back in when the dive log cannot be read (#2181)

App privacy

The developer, Eric Griffin, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to Submersion Dive Log

Looking for apps like Submersion Dive Log? Here are 6 similar apps on the App Store. The highest rated is Below: Scuba Dive Log & Sites (5.0/5), and 5 of the 6 are free to download.

Submersion Dive Log vs. alternatives
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Submersion Dive Log 4.5 / 5 (11 ratings) Free September 24, 2026
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AWU2UDDF 5.0 / 5 (2) Free Jul 7, 2025
Currents: Diving Community 4.2 / 5 (5) Free Sep 23, 2026
Abysner 5.0 / 5 (2) 2.99 USD May 27, 2026
Dive Kit: Deco Planner & Tools 5.0 / 5 (1) Free Sep 28, 2026