Comparison

Trimix Tools vs Easy Deco

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

Head to head
About

Trimix Tools

This app provides essential tools for divers to plan and blend Trimix gases. It calculates optimal mixes based on depth, oxygen partial pressure, and equivalent narcotic depth, and supports various cylinder filling scenarios. Calculations are available offline and can be customized with saved settings.

Highlights
  • Trimix blending and planning
  • Depth and partial pressure calculations
  • Equivalent Narcotic Depth (END) calculation
  • Saltwater and freshwater support
  • Cylinder filling and bleed down calculations
  • Metric and Imperial system support
  • Offline functionality
  • Saved settings and custom mixes
Features
Currently charting
Read full description

Trimix blending and planning tools that can be used where you are and when you need them. You can use these tools to plan your mixes prior to arriving at the dive shop or to fill your cylinder at the air station or on the boat. Calculations are provided for the best Trimix given a planned depth and a desired maximum partial pressure of oxygen and equivalent narcotic depth (END). You can also calculate the ceiling and maximum depths along with your END based on your planned mix. The dive planning tools support both salt water and fresh water calculations. The blending tools provide for filling a cylinder with a remaining mix (or empty) to a specified target mix using oxygen, helium and a topping mix (air or another available mix). You can also calculate the result of topping an existing partially filled cylinder with a specific topping mix (air or another available mix). There is also a Bleed Down calculator that allows you adjust an existing full or partially full cylinder to a new mix with minimal wasted gas. Trimix Tools supports calculations in both metric and Imperial/US systems of measure. Traveling on a boat or working out of network range? These tools are at hand any time you have your iPhone, iPad or iPod touch. You could, for example, easily calculate the result of topping your cylinder from your first dive with air from the boat's compressor to take advantage of any remaining mix. You also have the convenience of saved settings that you can recall at a touch and adjust to a new situation as needed. Chances are you regularly work with a specific set of mixes and common dive situations. Trimix Tools includes the convenience of saved settings that you can recall and adjust to a new situation as needed. You can also select mix values using pre-installed default mixes or your own saved custom mixes. When updating one of the mixes for a tool you are offered a list of saved mixes that you can use directly or adjust as needed. You can save the currently displayed mix by tapping on the "+" button. Just like with the saved calculations, you can re-arrange or delete any mixes in your saved list. Do you need to share your planning or blending calculations with other divers? All the tools have the ability to share the results of the calculations from within the application. You can set default email addresses and a subject Trimix Tool's settings that will be automatically added when you share a result. All END calculations (Dive Planning and Best Trimix tabs) in Trimix Tools treat oxygen as a narcotic gas by default. There is an option available under the Settings tab to change the default so that oxygen is not treated as narcotic if that is your preference. Remember you must always personally analyze your mix before diving it. This application is not a substitute for proper training and should not be used as a substitute for proper dive planning or the primary Trimix blending and planning methods taught during training. Please do not attempt to handle high pressure oxygen or fill SCUBA cylinders without proper training.

About

Easy Deco

This app assists technical divers in planning dives for open circuit and closed circuit systems. It allows for easy setup of various gas mixes and cylinders, providing insights into their effects and requirements. The app warns users about critical factors like PPO2, ICD, and gas density.

Highlights
  • Open circuit and closed circuit dive planning
  • Customizable gas and cylinder setups
  • Real-time gas requirement calculations
  • Warnings for PPO2, ICD, and gas density
  • Supports multiple common gas mixes
Features
Read full description

Dive planning app for open circuit and closed circuit technical divers.  Easy setup of different gasses and cylinders for later use so you can quickly swap between your common mixes and see the effects and gas requirements for your dive plan. Warns for PPO2, ICD, gas density, gas requirements etc. Privacy Policy - http://www.tec-diver.eu/easy-deco-privacy-policy.html End User License Agreement - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Trimix Tools4 screens
Easy Deco4 screens

Verdict

The call

The clearest difference is price: Easy Deco at Free against Trimix Tools's $6.99. Easy Deco also leads on update cadence (every 2 months vs every 5 months). Trimix Tools's advantage is rating (5.0 vs 3.0) and in-app purchases (none vs 3). On review sentiment, ratings volume, ads and iOS requirement 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

Easy Deco is free to download; Trimix Tools costs $6.99 up front. Easy Deco sells 3 in-app purchases, starting at $1.99 per month. Trimix Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Trimix Tools holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Trimix Tools ships an update every 5 months, Easy Deco every 2 months. The most recent releases landed on September 10, 2026 and June 7, 2026 respectively.

Scorecard7 real differences · 4 level
Trimix Tools versus Easy Deco: the parameters behind the verdict, then further details
ParameterTrimix ToolsEasy Deco
Price$6.99Free — better
Rating5.0 (5 ratings) — better3.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings5 — better2
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#59 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.6 — better16.3
Further details — not scored
Size6 MB3 MB
Age rating4+4+
DeveloperGreg MclaughlinMillennium Ltd

Customer experience

Trimix Tools

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Easy Deco

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Trimix Tools

No in-app purchases

3 purchases

Easy Deco

Subscriptions2
  • Monthly7 Days trial$1.991 Month
  • Annual14 Days trial$9.991 Year
One-time1
  • Lifetime$24.99

Questions

Is Trimix Tools free?
Trimix Tools costs $6.99, with no in-app purchases.
Is Easy Deco free?
Easy Deco is free to download, with in-app purchases available.
Which has better reviews, Trimix Tools or Easy Deco?
Trimix Tools is rated higher. Trimix Tools averages 5.0 out of 5 from 5 ratings, while Easy Deco averages 3.0 from 2 ratings.
Do Trimix Tools or Easy Deco have ads?
Neither Trimix Tools nor Easy Deco shows ads.
Which is updated more often, Trimix Tools or Easy Deco?
Trimix Tools ships an update every 5 months, and Easy Deco every 2 months. Most recently, Trimix Tools was updated on September 10, 2026 and Easy Deco on June 7, 2026.

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