Comparison

Trimix Tools vs Dive Check

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 Check

Create and share comprehensive gear checklists for diving trips. Ensure nothing is forgotten with customizable lists and reminders. Perfect for divers, snorkelers, and anyone carrying extensive equipment.

Highlights
  • Create custom checklists
  • Share lists with friends
  • Set reminders
  • Use default checklists
  • Edit and modify lists
  • Add new items
Features
Read full description

Dive Check is useful and simple to use application for creating checklists for scuba divers, technical divers, snorkelers and everyone else who carries a lot of gear on locations, and needs to make sure that nothing is forgotten, or misplaced. Did you ever want to send a list of equipment to your dive buddy or friend, so they don't forget something on the next diving trip? With Dive Check you can create a list and share it with as many friends as you want to, set reminders, and never miss a dive due to forgotten equipment or gear. - Use Default Checklists - Create Reminders - Create Empty or Template Checklists - Edit, Delete, or Modify Checklists - Add New Items in Checklists - Send (Share) Checklists with friends Enjoy Dive Check, and Safe Diving!

Screenshots

Trimix Tools4 screens
Dive Check4 screens

Verdict

The call

The clearest difference is review sentiment: Trimix Tools at 100% against Dive Check's 50%. Trimix Tools also leads on rating (5.0 vs 1.0) and in-app purchases (none vs 1). Dive Check's advantage is price (Free vs $6.99) and update cadence (every 4 days vs every 4 months). On ratings volume, 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 Check is free to download; Trimix Tools costs $6.99 up front. Dive Check sells 1 one-off in-app purchase. 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 1.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 100% of Trimix Tools's written reviews are positive against 50% of Dive Check's.

UpkeepUpdate frequency

Trimix Tools ships an update every 4 months, Dive Check every 4 days. The most recent releases landed on November 10, 2026 and November 2, 2026 respectively.

Scorecard7 real differences · 3 level
Trimix Tools versus Dive Check: the parameters behind the verdict, then further details
ParameterTrimix ToolsDive Check
Price$6.99Free — better
Rating5.0 (5 ratings) — better1.0 (2 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings5 — better2
Update frequencyEvery 4 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.68.0 — better
Further details — not scored
Size6 MB7 MB
Age rating4+4+
DeveloperGreg MclaughlinAXIS Productions

Customer experience

Trimix Tools

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

Dive Check

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Trimix Tools

No in-app purchases

1 purchases

Dive Check

One-time1
  • Dive Check Full Version$2.99

Questions

Is Trimix Tools free?
Trimix Tools costs $6.99, with no in-app purchases.
Is Dive Check free?
Dive Check is free to download, with in-app purchases available.
Which has better reviews, Trimix Tools or Dive Check?
Trimix Tools is rated higher. Trimix Tools averages 5.0 out of 5 from 5 ratings, while Dive Check averages 1.0 from 2 ratings.
Do Trimix Tools or Dive Check have ads?
Neither Trimix Tools nor Dive Check shows ads.
Which is updated more often, Trimix Tools or Dive Check?
Trimix Tools ships an update every 4 months, and Dive Check every 4 days. Most recently, Trimix Tools was updated on November 10, 2026 and Dive Check on November 2, 2026.

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