Comparison

MyFathom vs Arcus Trimix Blender

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

Head to head

MyFathom

Free

🔧 Utilities

★ 5.01 ratingsView app →

About

MyFathom

This app supports rebreather divers by providing tools for building checklists, monitoring O2 cell performance, logging dives, and storing certification cards. It's designed to be a comprehensive companion for technical diving needs.

Highlights

Build custom checklists
Monitor O2 cell performance
Log dive data
Store certification cards

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

About

Arcus Trimix Blender

Features

Read full description

Arcus Trimix Blender is an application that helps scuba divers calculate trimix and nitrox blends. Calculations are done with Van der Waals equations.

Screenshots

MyFathom3 screens

Arcus Trimix Blender1 screens

Verdict

The call

The clearest difference is update cadence: Arcus Trimix Blender at every 5 days against MyFathom's every 13 months. MyFathom's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MyFathom ships an update every 13 months, Arcus Trimix Blender every 5 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 7 level

MyFathom versus Arcus Trimix Blender: the parameters behind the verdict, then further details
Parameter	MyFathom	Arcus Trimix Blender
Price	Free	Free
Rating	5.0 (1 ratings) — better	—
Number of ratings	1 — better	—
Update frequency	Every 13 months	Every 5 days — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	11.0 — better	15.0
Further details — not scored
Size	35 MB	3 MB
Age rating	4+	17+
Developer	FATHOM Dive Systems, LLC	Kim Taavo

In-app purchases

None

MyFathom

No in-app purchases

None

Arcus Trimix Blender

No in-app purchases

Questions

Is MyFathom free?

MyFathom is free to download, with no in-app purchases.

Is Arcus Trimix Blender free?

Arcus Trimix Blender is free to download, with no in-app purchases.

Do MyFathom or Arcus Trimix Blender have ads?

Neither MyFathom nor Arcus Trimix Blender shows ads.

Which is updated more often, MyFathom or Arcus Trimix Blender?

MyFathom ships an update every 13 months, and Arcus Trimix Blender every 5 days. Most recently, MyFathom was updated on November 3, 2026 and Arcus Trimix Blender on November 4, 2026.