# Submersion Dive Log — Scuba Dive Log

> Comprehensive open-source dive log for recreational and technical divers. (iPhone/iPad app by Eric Griffin.)

- Source: https://appshunter.io/ios/app/submersion-dive-log/id6757456915 (this page in markdown: same URL + `.md`)
- Developer: [Eric Griffin](https://appshunter.io/developer/1867101718)
- Category: Sports, Travel
- Price: Free
- Rating: 4.60/5 from 7 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 147 MB
- Languages: American English
- Released: 2026-03-10
- Data updated: 2026-09-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/submersion-dive-log/id6757456915/reviews.md

## What is 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.

## Key features

- Log unlimited dives with detailed conditions
- Dive computer integration
- Advanced profile analysis
- Technical diving support
- Gear and equipment management
- Dive site database with maps
- Marine life tracking

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/submersion-dive-log/id6757456915/reviews.md

### 5/5 — Nice app and keeps getting better

*2026-08-31*

It’s a nice app. The UI is beautiful and it continues to get better and better. I was looking for something to replace the Shearwater water dive app, which is awful I’ve opened up a few bug requests and they definitely get resolved. Super happy with this app.

### 5/5 — Great App so far

*2026-08-24*

I find this app much more feature rich and useful than shearwater cloud or Subsurface. There are a few things I trace wise I found confusing and certain items that seemed Barrie’s and hard to find. I find inputting gps coordinates correctly to be challenging, usually trial and error and using ChatGPT to convert them correctly to get them to work.

Seems like there are always new features which are nice and bug fixes are prompt.

### 2/5 — Need a bit of tech knowledge to get it running .

*2026-08-20*

I started using Subsurface on Mac and built out my dive log and set it to backup on my iCloud . Downloaded the IOS app and there is no way to synch to the Mac back up. The app states I need to go to GitHub and download a file to update the app. Huh? Looks like this is an open source app and unless you have some tech experience and be willing to side load apps on your phone. After doing this I have not found a way to get the MacOs logs and the App logs to synch. Have to delete the log in the phone and the set it up again and select the backup from the desktop version anytime I make a change on the desktop version.

### 3/5 — Nice app has promise but

*2026-07-11*

It’s a nice app. The UI is beautiful however it’s still a little rough around the edges. I was looking for something to replace this year water dive app, which is awful and this isn’t gonna cut it. I’ve opened up a few bug requests but they keep getting closed and the issues are never really solved, but I’ll give it three stars because the UI is really nice.

### 5/5 — This is the one log app to rule them all

*2026-03-22*

Finally! A full-featured, modern dive log app. Submersion has everything I’ve ever wanted in a dive log app and more I didn’t even think about. It’s amazing that this is free, open-source, and completely private. There are a few rough edges, but nothing that would stop me from recommending this app to other divers. I’m still trying to figure out importing all my dives and locations, and syncing between my devices. This isn’t on the developer, but the version here on the App Store is behind what is available as a direct download.

## Frequently asked questions about Submersion Dive Log

### What types of dives can I log with Submersion?

Submersion supports over 20 dive types, including night, wreck, cave, and technical dives. You can log details like depth, duration, temperature, visibility, current, and more for each dive.

### Can Submersion connect to my dive computer?

Yes, Submersion offers dive computer integration via Bluetooth or USB for brands like Shearwater, Suunto, Mares, Aqualung, and Garmin. You can import dive profiles with one tap.

### Does Submersion have any subscription fees?

No, Submersion is completely free to use. It does not have any subscriptions, proprietary lock-in, or costs associated with its features.

### How does Submersion handle data backup and syncing?

Submersion offers cloud sync via iCloud or Google Drive, allowing you to sync across all your devices. It also has a local-first design, meaning it works completely offline.

### Can I export my dive data from Submersion?

Yes, you can export your dive data in open formats such as UDDF, CSV, or PDF. This ensures your data is accessible and not locked into a proprietary system.

### What kind of analysis does Submersion provide?

Submersion offers advanced profile analysis with interactive charts, decompression algorithm visualization, ascent rate monitoring, and O₂ toxicity tracking. It also provides statistics on dive frequency, gas mix distribution, and personal records.

### Is Submersion suitable for technical divers?

Absolutely. Submersion is built for technical diving with multi-tank support, full gas mix tracking (Air, Nitrox, Trimix), MOD/END/EAD calculations, and gas switch markers on dive profiles.

### Does Submersion have ads?

No, Submersion is ad-free. As an open-source application, it focuses on providing a clean and uninterrupted user experience without advertisements.

## Version history (last 5 releases)

### 1.7.6 — 2026-08-29

## 1.7.6 (2026-08-28)

### Features

- per-type visibility toggles for dive type badges (schema v172)
- show dive type badges in the dive list, matching header sizing
- show dive type badges in the dive detail header
- list the dives where a species was seen on its detail page
- link the Marine Life tab to the Species page and localize the ranking
- serve the Species page at /species and move the catalog manager to /species/manage
- add the Species page
- add the SeenSpeciesTile row
- add Species page, sightings section and statistics strings
- add seen species and species sightings providers
- rebuild the detailed buddy card and add a compact buddy card driven by slot configs
- drive the compact site card from its slot config and localize the dive count
- enrich the detailed site card with configurable slots, stats and feature chips
- add EntityCardStat and EntityCardExtraFields slot renderers
- persist site and buddy card slot configs per diver
- add persisted EntityCardConfigNotifier
- add lastDive field and format certifications by display name
- add depthRange, lastDived and maxDepthReached site fields
- batch last dive together and usual role per buddy
- batch last-dived, max depth reached and feature types per site
- add SeenSpeciesRepository.getSightingsForSpecies
- add SeenSpeciesRepository.getSeenSpecies
- add the pure search and sort for seen species
- add SeenSpecies and SpeciesSightingRecord entities
- represent SAC and RMV as separate quantities (#354, #803)
- add GasConsumptionDisplay and GasConsumptionLane
- show a dive computer's linked gear item on its detail page
- seed gear twins from the imported-computer self-heal
- backfill dive computer gear twins at v169
- link the gear twin when a dive source is replaced
- attach dive computer gear twins at the import seams
- seed a gear twin when a dive computer is registered
- add dive_computers.equipment_id gear-twin bridge at v169
- deterministic gear-twin identity for dive computers
- Z-axis picker, framed chrome, tooltip and readout on the dive page
- shared readout rows, hover tooltip, richer readout panel
- add HoverPicker with grid and path implementations
- Z axis input in display units and a Z-aware geometry key
- add dive axis frame, tick helpers, and labels
- build the single-dive scene as a Z-metric path
- curtain and markers follow the path Z
- turn the deco ceiling into a margin sheet on the path
- add ShadowBuilder for wall shadows and drop lines
- add PathBuilder tube and shared stripIndices
- resample Z metric series with gap interpolation
- add ZAxisSpec with nice-number range and Z mapping
- add tts metric and Z-capable metric set
- fetch conditions for every dive that is missing them
- add the European chamber rows to the directory
- curate the hyperbaric chamber directory
- explain why a file matched no dive and give it a way in
- show distance and capability, add the chamber directory
- add a live capture-time offset control to the Files review pane
- map-first desktop layout, summary strip, and empty state
- hold a session capture-time offset in the Files tab state
- parse chamber leads from the national registries
- add bulk dismiss for safety review findings
- read trip day weather from the database
- add a capture-time offset and failure reasons to DivePhotoMatcher
- add the chamber harvester with validation gates
- add per-file unmatched diagnostics to MatchedSelection
- fetch and store trip day weather once
- order chambers by capability band then distance
- record which cascade tier produced a capture time
- decide which trip days need a weather lookup
- replicate trip day weather
- add capability and provenance fields to EmergencyChamber
- add TripDayWeatherRepository
- add trip_day_weather table at schema v168
- pair Surface GPS with Tide, Cylinders with Weights
- make the master-detail pane divider user-resizable
- attach Subsurface-ref

### 1.7.5 — 2026-08-27

## 1.7.5 (2026-08-24)

### Features

- show a thumbnail for every pre-import review row
- run the unlinked-media sweep on every launch
- fold Unlinked and Missing into the Library
- manifest import and polling insert linked rows only
- URL tab resolves metadata before inserting
- shared link resolution for network imports
- add resolve/insertResolved to the network pipeline
- review library imports before any row is written
- add the shared pre-import review page
- add DiveLinkMatcher, the one timestamp-to-dive answer
- replace the library filter chip row with a toolbar and sheet
- add the active filter chip strip
- add the library filter bottom sheet
- reload the library when the sort changes
- sort library pages by date, name, or size
- add library sort field enum and persisted sort provider
- unlinking media from a dive removes it from the library
- show where every thumbnail is served from
- edit buddy roles from the bulk editor
- add My role to the bulk dive editor
- add a check-all-media action to Media Sources
- sweep every source type, not just local files
- persist orphan state discovered while serving a tile
- add a narrow verified-state write
- add the orphan reconciliation decision function
- a running bill for a whole blending session
- add Ratio Computers XML file import
- show dive mode badge across dive detail and list views
- hydrate saved blender preferences on open
- cost a fill at the fill station's prices
- reusable target mix templates
- report fill amounts in bar, not litres
- fill temperature, settled temperature and gas model
- persist templates, prices and blending conditions
- price a fill procedure per 100 litres of gas
- solve on molar density with fill and settled temperatures
- three-model equation of state on molar density
- credit contributors in the stable release notes
- browse previously used tags when editing a dive (#1171)
- let the user retry a still-loading tile by tapping it
- add a recoverable still-loading placeholder state
- manage service types from Settings > Manage
- ask for one service type when logging service
- choose a default category per service type
- resolve a service type's default category
- rename service_type to service_category (v159)
- add default_category to service types (v159)
- move the main database to WAL journal mode
- selectable ideal/real gas model, and fix the SAC unit mismatch (#828)
- offer an entry/exit method fill from dive history (#1104)
- derive an entry/exit suggestion from dives at the site (#1104)
- show entry and exit method on the site detail page (#1104)
- Excel maintenance log entry points (#829)
- merge-mode cycling for entry and exit method (#1104)
- edit entry and exit method in the access section (#1104)
- snap entry/exit method from the assigned site (#1104)
- add the site entry/exit snap rule (#1104)
- Maintenance Log Excel sheet builder (#829)
- carry entry/exit method through the site entity and repository (#1104)
- compute deco classification via the dive analysis
- add local cache for computed deco classification
- default service price on kind and schedule (#829)
- add dive_sites entry_method and exit_method (v154, #1104)
- resolve default service cost, schedule before kind (#829)
- update tank specs in place, keeping pressures (#797)
- carry default service cost through entities and repos (#829)
- default service cost columns, schema v154 (#829)
- filter maintenance history by task, type and year (#829)
- maintenance history filter model (#829)
- name the maintenance task in service history (#829)
- localize ServiceType labels (#829)
- recognise reprogrammed dive-cable USB IDs on other platforms (#732)
- request the USB device entitlement for raw-USB cables (#732)
- fall back to raw-USB cables when no serial port answers (#732)
- libdivecomputer iostream over raw-USB FTDI cables (#732)
- IOUSBLib shim for unclaimed FTDI dive cables (

### 1.7.2 — 2026-08-03

Bug fixes.

### 1.7.1 — 2026-07-31

Many bug fixes

### 1.7.0 — 2026-07-26

v1.7.0 introduces a ton of new features. Big logbooks that had become painfully slow are now fast. Your photos and videos can live in cloud storage you own and appear on every one of your devices. There is a new post-dive safety suite, a review inbox that finds suspicious imported data, 3D views of your dives, a weight planner that learns from your own history, optional password protection for both sync and backups, and a planner that finally uses the whole window. There is also a redesigned home dashboard and an app-wide display zoom that lets you trade size for density on any screen. Around those headliners are deeper equipment and certification tracking, a new import path for Aqualung DiverLog users, Shearwater Perdix 3 downloads, and a long list of fixes. Everything upgrades automatically the first time you open the app.

## Related topics

[scuba diving log](https://appshunter.io/ios/topics/scuba-diving-log) · [submersion dive log](https://appshunter.io/ios/topics/submersion-dive-log) · [submarine dive master](https://appshunter.io/ios/topics/submarine-dive-master)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*