Comparison

Trimix Tools vs Dive Calculator

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
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

Dive Calculator

This app provides comprehensive scuba diving calculations, including basic, nitrox, and trimix gas mixes. It supports both metric and imperial units, and allows for gas volume and cost calculations for blending and top-ups. Results can be easily copied for documentation.

Highlights
  • Basic, Nitrox, and Trimix calculations
  • Gas volume and cost calculations
  • Top-up and bleed down mix calculations
  • Metric and imperial unit support
  • Oxygen narcotic/non-narcotic selection
  • Copy results to clipboard
Features
Read full description

A wide variety of scuba based calculations for all levels of divers. Basic Calculations Include: -ATA -SAC / RMV rates -Tank volume / Pressure rating -Basic unit conversions Nitrox Calculations Include: -EANx best mix -Integrated top-up and bleed down mix calculations -What if top–up -EANx mix planning Trimix Calculations Include: -Integrated top-up and bleed down mix calculations -What if top–up -Trimix planning -Best Trimix -Heliair All blending and top up pages include gas volume and cost calculations. Trimix gas fill orders can be changed by simply dragging the icons to select the fill order. Oxygen can be selected as narcotic / non-narcotic on the appropriate calculation pages. Results can be copied to the clipboard in a text format for use in E-mails, messages or other forms of documentation. All pages support metric and imperial units. Many pages include both metric and imperial units.

Screenshots

Trimix Tools4 screens
Dive Calculator4 screens

Verdict

The call

The clearest difference is price: Dive Calculator at Free against Trimix Tools's $6.99. Dive Calculator also leads on ratings volume (24 vs 5) and iOS requirement (6.0 vs 15.6). Trimix Tools's advantage is in-app purchases (none vs 2) and rating (5.0 vs 4.6). On review sentiment, 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

Dive Calculator is free to download; Trimix Tools costs $6.99 up front. Dive Calculator sells 2 one-off in-app purchases. 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 4.6. Both are backed by a comparable volume of ratings — 5 and 24 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Trimix Tools ships an update every 5 months, Dive Calculator every 12 months. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

Scorecard7 real differences · 3 level
Trimix Tools versus Dive Calculator: the parameters behind the verdict, then further details
ParameterTrimix ToolsDive Calculator
Price$6.99Free — better
Rating5.0 (5 ratings) — better4.6 (24 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings524 — better
Update frequencyEvery 5 months — betterEvery 12 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.66.0 — better
Further details — not scored
Size6 MB7 MB
Age rating4+4+
DeveloperGreg MclaughlinZanthic Automation Inc.

Customer experience

Trimix Tools

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

Dive Calculator

All ratings24 ratings
Positive91.7%
Neutral4.2%
Negative4.2%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Trimix Tools

No in-app purchases

2 purchases

Dive Calculator

One-time2
  • EANx Calculations$0.99
  • Trimix Calculations$0.99

Questions

Is Trimix Tools free?
Trimix Tools costs $6.99, with no in-app purchases.
Is Dive Calculator free?
Dive Calculator is free to download, with in-app purchases available.
Which has better reviews, Trimix Tools or Dive Calculator?
Trimix Tools is rated higher. Trimix Tools averages 5.0 out of 5 from 5 ratings, while Dive Calculator averages 4.6 from 24 ratings.
Do Trimix Tools or Dive Calculator have ads?
Neither Trimix Tools nor Dive Calculator shows ads.
Which is updated more often, Trimix Tools or Dive Calculator?
Trimix Tools ships an update every 5 months, and Dive Calculator every 12 months. Most recently, Trimix Tools was updated on September 29, 2026 and Dive Calculator on September 21, 2026.

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