Trimix Tools vs iDeco Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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.
iDeco Pro
This app is a comprehensive dive planner for technical divers, supporting both open circuit and closed-circuit rebreather (CCR) diving. It calculates decompression stops, gas usage, CNS and OTU exposure, and surface intervals. The app also includes a gas mixer for planning custom gas blends.
- Open Circuit and CCR dive planning
- Decompression stop calculation
- Gas usage and CNS/OTU tracking
- Surface interval tracking
- Gas fill/mixer functionality
- Bailout planning for overhead environments
- Configurable settings within the app
Read full descriptionHide full description
A complete multiple dive / multi-level dive planner for the technical diver. Includes support for Open Circuit Diving as well as Closed Circuit Rebreathers (CCR). Includes decompression stops, gas usage, CNS tracking, OTU tracking, Surface Interval tracking and many other features. Currently implements the Buhlmann ZHL16/C with Erik Baker's GF algorithm. Open Circuit - Scuba : Supports Air to TriMix (any combination of O2/He/N2), with an unlimited number of decompression gases. Includes Thirds support for planning dives. Closed Circuit (CCR): Supports any O2/He/N2 combination for diluent. Automatically generates bailout plans based on entry of bailout gases. Features a Cave/Wreck bailout option for overhead environment bailouts and gas planning. Gas Fill/Mixer: Allows for filling of Air, Nitrox and Trimix via a simple, easy to use interface. All settings are configurable via the iPhone Settings. Supports US Imperial and Metric iDeco Pro vs. iDeco Pro has many features and improvements to make dive planning even easier. 1) Fully revamped user experience 2) Settings can now be changed in the app. 3) My Gases - Allows you to have a list of the 50 most used gases. Works for the dive phase, deco phase and bailout. 4) New runtime display. 5) Added much higher pressure support for mixing. 6) Superior email support - You can now view, edit and cc others on your plans. 7) Many, many more small features added. 8) Future support for many more decompression algorithms.
Screenshots
Verdict
The clearest difference is review sentiment: Trimix Tools at 100% against iDeco Pro's 52%. Trimix Tools also leads on rating (5.0 vs 3.9) and update cadence (every 5 months vs every 18 months). iDeco Pro's advantage is iOS requirement (7.0 vs 15.6). On ratings volume, ads, in-app purchases and monetization model 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
Trimix Tools costs $6.99 and iDeco Pro $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Trimix Tools holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 5 and 10 respectively. Written reviews point the same way: 100% of Trimix Tools's written reviews are positive against 52% of iDeco Pro's.
Trimix Tools ships an update every 5 months, iDeco Pro every 18 months. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.
| Parameter | Trimix Tools | iDeco Pro |
|---|---|---|
| Price | $6.99 — better | $8.99 |
| Rating | 5.0 (5 ratings) — better | 3.9 (10 ratings) |
| Positive reviews | 100.0% of reviews — better | 52.0% of reviews |
| Number of ratings | 5 | 10 — better |
| Update frequency | Every 5 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #59 — better | #68 |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 7.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Greg Mclaughlin | B2 Prototech LLC |
Customer experience
Trimix Tools
iDeco Pro
In-app purchases
Trimix Tools
No in-app purchases
iDeco Pro
No in-app purchases
Questions
Is Trimix Tools free?
Is iDeco Pro free?
Which has better reviews, Trimix Tools or iDeco Pro?
Do Trimix Tools or iDeco Pro have ads?
Which is updated more often, Trimix Tools or iDeco Pro?
Which is more popular, Trimix Tools or iDeco Pro?
Other comparisons















