Comparison

Nitrox Tools vs Deep Tools

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

Head to head
About

Nitrox Tools

This app provides essential tools for divers to plan and blend enriched air nitrox. It calculates dive parameters like equivalent air depth and maximum operating depth, and supports various blending methods for custom gas mixes. Easily switch between metric and imperial units and save custom settings for frequent use.

Highlights
  • Enriched air nitrox blending
  • Dive planning calculations
  • Equivalent Air Depth (EAD)
  • Partial Pressure of Oxygen (PPO2)
  • Maximum Operating Depth (MOD)
  • Save custom mixes and settings
  • Metric/Imperial unit switching
Features
Read full description

Enriched Air Nitrox blending and planning tools in your hand and available at a touch. You can use these tools at your air station to provide the information you need to fill a Nitrox tank from any existing mix (or empty). Dive Planning tools provide your Equivalent Air Depth, PPO2 at your planned depth, Maximum & Contingency Operating Depth at various oxygen partial pressures and the "best mix" for a planned depth and oxygen partial pressure. You can easily switch between Metric and Imperial/U.S. systems of measurement to adapt to a new fill station. The dive planning tools also support both salt and fresh water calculations. Chances are you regularly work with a specific set of mixes and and common dive situations. Nitrox Tools includes the convenience of saved settings that you can recall at a touch 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 clicking 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 within Nitrox Tool's settings that will be automatically added when you share a result. Nitrox Tools supports a number of blending methods: • Top Up - blend a final mix from starting mix and pressure using 100% oxygen and air or any available topping mix. • Bleed Down - save expensive oxygen and valuable time by easily calculating how much gas to bleed from an existing cylinder to switch to a different mix using air or any available topping mix. • Mix + Mix - make a specific final mix using the remaining gas in the cylinder and mixing that with banked Nitrox (rather than pure oxygen) and air or another topping mix. This enables the blending of Nitrox without the use of pure oxygen for certain combinations of mixes. Avoiding pure oxygen may increase the safety of the blending process and help manage the cost. • Top Off - determine the expected result from topping an existing cylinder with air or some other topping mix. This situation is common when a diver wants to have the blender top the mix remaining from the first dive with air from the boat's compressor. 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 Nitrox blending and planning methods taught during training. Please do not attempt to handle high pressure oxygen or fill SCUBA cylinders without proper training.

About

Deep Tools

This app is a comprehensive tool for divers, offering dive planning, logging, and gas blending. It supports recreational, technical, and rebreather diving with advanced decompression planning and dive computer integration. Plan complex dives, log your adventures, and mix gases with precision.

Highlights
  • Decompression dive planning (Bühlmann ZH-L16)
  • Dive log with Shearwater import
  • Nitrox and Trimix gas blending
  • Multiple dive calculators
  • Metric and imperial unit support
  • Multi-level and repetitive dive planning
Features
Read full description

The complete dive planner, dive log and dive calculator app for recreational, technical and rebreather divers. Plan decompression dives with Bühlmann ZH-L16 and gradient factors, import your dives from a Shearwater dive computer, blend nitrox and trimix, and get quick answers to the questions you ask before every dive. All in one app, for open circuit (OC) and CCR. Whether you are in dive training, planning complex deco dives, or logging your underwater adventures, Deep Tools gives you reliable results you can trust. DIVE CALCULATORS - Maximum Operating Depth (MOD) - Oxygen partial pressure (ppO₂) - Equivalent Air Depth (EAD) - Equivalent Narcotic Depth (END) - Equivalent Air Density Depth (EADD) - No Decompression Limit (NDL) - Best nitrox mix for depth - Best trimix mix for depth - Gas consumption (SAC / RMV) and gas density - Lift bag calculator DECO PLANNER * Plan complex dives with confidence on open circuit (OC) or rebreather (CCR): - Bühlmann ZH-L16B and ZH-L16C with gradient factors (GF) - Multi-level and repetitive dive planning - Lost gas plans and CCR bailout planning, with custom bailout points - Gas consumption, CNS and OTU for every dive - Dive profile, run time table, tissue pressure graph and slate view - Share dive plans as a file, text, slate or image DIVE LOG * - Import dives from Shearwater dive computers (Petrel, Perdix, NERD, Teric and more) - Full dive profile with ppO₂, CNS, TTS, SAC and gas density - Dive sites with name, coordinates, map and custom tags - Automatically merge dives with short surface intervals - Share dives with your buddies - Local backup and easy transfer to a new device GAS BLENDER * Mix accurate nitrox and trimix: - Partial pressure blending to the desired gas - Blending with a top-off gas - Continuous flow blending - Gas cost estimate MORE - Metric and imperial units - Altitude diving and water type (salt, fresh, EN13319) - Custom tank / cylinder database - Available in 11 languages * The deco planner, dive log and gas blender are included in Deep Tools Premium. Try them free during the free trial. Deep Tools is a planning aid. It does not replace proper dive training or certification. Special thanks to V. Paul Gordon, Serge Nelissen and Michael Heus for extensive testing and valuable contributions. Terms of Use: https://www.deepblue.si/privacy/terms-of-service.php Privacy Policy: https://www.deepblue.si/privacy/

Screenshots

Nitrox Tools4 screens
Deep Tools4 screens

Verdict

The call

The clearest difference is price: Deep Tools at Free against Nitrox Tools's $5.99. Deep Tools also leads on ratings volume (93 vs 4) and update cadence (every 2 months vs every 4 months). Nitrox Tools's advantage is review sentiment (88% vs 50%) and in-app purchases (none vs 3). On ads 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

Deep Tools is free to download; Nitrox Tools costs $5.99 up front. Deep Tools sells 3 in-app purchases, starting at $7.99 per month. Nitrox Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Nitrox Tools holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Deep Tools has 93 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 88% of Nitrox Tools's written reviews are positive against 50% of Deep Tools's.

UpkeepUpdate frequency

Nitrox Tools ships an update every 4 months, Deep Tools every 2 months. Both last shipped on November 13, 2026.

Scorecard9 real differences · 1 level
Nitrox Tools versus Deep Tools: the parameters behind the verdict, then further details
ParameterNitrox ToolsDeep Tools
Price$5.99Free — better
Rating5.0 (4 ratings) — better4.6 (93 ratings)
Positive reviews88.5% of reviews — better50.0% of reviews
Number of ratings493 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size7 MB13 MB
Age rating4+4+
DeveloperGreg MclaughlinDeep Blue d.o.o.

Customer experience

Nitrox Tools

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews26 reviews
Positive88.5%
Neutral0.0%
Negative11.5%

Deep Tools

All ratings93 ratings
Positive91.4%
Neutral2.2%
Negative6.5%
Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

In-app purchases

None

Nitrox Tools

No in-app purchases

3 purchases

Deep Tools

Subscriptions2
  • Subscription Monthly$7.991 Month
  • Subscription Yearly3 Days trial$22.991 Year
One-time1
  • Lifetime Subscription$49.99

Questions

Is Nitrox Tools free?
Nitrox Tools costs $5.99, with no in-app purchases.
Is Deep Tools free?
Deep Tools is free to download, with in-app purchases available.
Which has better reviews, Nitrox Tools or Deep Tools?
Nitrox Tools is rated higher. Nitrox Tools averages 5.0 out of 5 from 4 ratings, while Deep Tools averages 4.6 from 93 ratings.
Do Nitrox Tools or Deep Tools have ads?
Neither Nitrox Tools nor Deep Tools shows ads.
Which is updated more often, Nitrox Tools or Deep Tools?
Nitrox Tools ships an update every 4 months, and Deep Tools every 2 months. Most recently, Nitrox Tools was updated on November 13, 2026 and Deep Tools on November 13, 2026.

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