Comparison

Deep Tools vs MyFathom

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Deep Tools

This comprehensive dive toolkit helps recreational, advanced, and technical divers plan dives, log underwater adventures, and blend gases. It offers advanced planning tools, dive computer import, and essential calculations for safe and efficient diving.

Highlights
  • Advanced Deco Planner
  • Dive Log with Shearwater import
  • Gas Blender for Trimix/Nitrox
  • Maximum Operating Depth (MOD) calculator
  • No Decompression Limit (NDL) tracking
  • Metric and Imperial units
Features
Read full description

The Complete Dive Toolkit Deep Tools is a must-have application for recreational, advanced, and technical divers. Whether you are learning to dive, planning complex decompression dives, or logging your underwater adventures, Deep Tools provides reliable tools you can trust. Import dives directly from your Shearwater dive computer, plan dives using the advanced Deco Planner, or use the app as a practical learning aid during your dive training. Tools included:
 - Maximum Operating Depth (MOD) - Oxygen Partial Pressure (ppO₂) - Equivalent Air Depth (EAD) - Equivalent Narcotic Depth (END) - Equivalent Air Density Depth (EADD) - No Decompression Limit (NDL) - Best Trimix for depth - Best Nitrox for depth - Gas consumption and density - Calculator for lifting bag Dive Log: * - Import dives from Shearwater dive computers (Petrel, Perdix, NERD, Teric, etc.) - Log dive sites with name, coordinates, and custom tags - Automatically merge dives with short surface intervals - Share logged dives with your buddies - Create local backups or migrate data to another device Advanced Dive Planner: * Plan complex dives with confidence, whether on Open Circuit (OC) or Rebreather (CCR): - Repetitive dive planning - Bühlmann ZH-L16B and ZH-L16C with Gradient Factors - Gas consumption, CNS, and OTU calculations - Visual dive profile, text plan, pressure graph, and slate view - Lost gas planning - CCR Bailout planning - Multiple point dive plan with custom bailout points - Share dive plans with friends Gas Blender: * Prepare accurate breathing gas mixtures: - Trimix and Nitrox blending - Mix to desired gas - Mix with Top-off gas - Continuous flow blending Additional Features - Metric and Imperial units - Adjustable altitude and water type (EN13319, salt, fresh) - Set your altitude - Custom tank / cylinder database * Advanced features are available with a subscription or during the free trial. Special thanks to V. Paul Gordon, Serge Nelissen and Michael Heus for extensive testing and valuable contributions! Terms of Service: http://www.deepblue.si/privacy/terms-of-service.php

About

MyFathom

Read full description

The MyFathom app is the companion app for Fathom CCR divers with everything you need to support your rebreather diving. Features: - Build checklist - O2 cell performance monitoring - Dive log - Certification cards

Screenshots

Deep Tools4 screens
MyFathom3 screens

Verdict

The call

The clearest difference is in-app purchases: MyFathom at none against Deep Tools's 3. MyFathom also leads on iOS requirement (11.0 vs 15.6). Deep Tools's advantage is update cadence (every 6 weeks vs every 13 months). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Deep Tools sells 3 in-app purchases, starting at $2.99 per month. MyFathom asks for nothing beyond the download.

UpkeepUpdate frequency

Deep Tools ships an update every 6 weeks, MyFathom every 13 months. The most recent releases landed on September 15, 2026 and September 9, 2026 respectively.

Scorecard3 real differences · 7 level
Deep Tools versus MyFathom: the parameters behind the verdict, then further details
ParameterDeep ToolsMyFathom
PriceFreeFree
Rating4.6 (93 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings93 — better—
Update frequencyEvery 6 weeks — betterEvery 13 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size12 MB35 MB
Age rating4+4+
DeveloperDeep Blue d.o.o.FATHOM Dive Systems, LLC

In-app purchases

3 purchases

Deep Tools

Subscriptions2
  • Subscription Monthly$2.991 Month
  • Subscription Yearly3 Days trial$17.991 Year
One-time1
  • Lifetime Subscription$39.99
None

MyFathom

No in-app purchases

Questions

Is Deep Tools free?
Deep Tools is free to download, with in-app purchases available.
Is MyFathom free?
MyFathom is free to download, with no in-app purchases.
Do Deep Tools or MyFathom have ads?
Neither Deep Tools nor MyFathom shows ads.
Which is updated more often, Deep Tools or MyFathom?
Deep Tools ships an update every 6 weeks, and MyFathom every 13 months. Most recently, Deep Tools was updated on September 15, 2026 and MyFathom on September 9, 2026.

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