Comparison

Trimix Tools vs DecoPlanner mobile

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

DecoPlanner mobile

Plan complex dive profiles using advanced decompression models. Track multiple gases, manage dive buddies, and visualize dive data with detailed graphs. Choose the version that suits your diving certification level.

Highlights
  • Open/Closed/Passive Semi-Closed Circuit planning
  • ZH-L16 / VPM-B decompression models
  • Gas tracking for multiple gases and dive buddies
  • Gas mixing (partial pressure & continuous blending)
  • Dive profile and tissue compartment graphs
  • Diving level selection (Rec 1 to Unlimited CCR)
Features
Read full description

Features: Open Circuit / Closed Circuit / Passive Semi-Closed Circuit planning ZH-L16 / VPM-B decompression models Convenient grouping of decompression stops Gas tracking of multiple gases and dive buddies Gas mixing through partial pressure and continuous blending Multiple graphs outlining dive profiles and tissue compartment pressures Select the version fitting your current level of diving, from Rec 1 to Unlimited CCR. More information at www.gue.com/store/software/decoplanner-4

Screenshots

Trimix Tools4 screens
DecoPlanner mobile4 screens

Verdict

The call

The clearest difference is review sentiment: Trimix Tools at 100% against DecoPlanner mobile's 40%. Trimix Tools also leads on chart position (#31 vs unranked). DecoPlanner mobile's advantage is price (Free vs $6.99) and update cadence (every 2 months vs every 5 months). On 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

DecoPlanner mobile is free to download; Trimix Tools costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Trimix Tools ships an update every 5 months, DecoPlanner mobile every 2 months. The most recent releases landed on September 10, 2026 and September 12, 2026 respectively.

Scorecard6 real differences · 5 level
Trimix Tools versus DecoPlanner mobile: the parameters behind the verdict, then further details
ParameterTrimix ToolsDecoPlanner mobile
Price$6.99Free — better
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews — better40.0% of reviews
Number of ratings5 — better—
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#31 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size6 MB74 MB
Age rating4+4+
DeveloperGreg MclaughlinGlobal Underwater Explorers Inc.

Customer experience

Trimix Tools

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

DecoPlanner mobile

Written reviews5 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

In-app purchases

None

Trimix Tools

No in-app purchases

None

DecoPlanner mobile

No in-app purchases

Questions

Is Trimix Tools free?
Trimix Tools costs $6.99, with no in-app purchases.
Is DecoPlanner mobile free?
DecoPlanner mobile is free to download, with no in-app purchases.
Do Trimix Tools or DecoPlanner mobile have ads?
Neither Trimix Tools nor DecoPlanner mobile shows ads.
Which is updated more often, Trimix Tools or DecoPlanner mobile?
Trimix Tools ships an update every 5 months, and DecoPlanner mobile every 2 months. Most recently, Trimix Tools was updated on September 10, 2026 and DecoPlanner mobile on September 12, 2026.

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