Comparison

Nitrox Tools vs Dive Kit

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

Dive Kit

This app provides comprehensive dive planning tools for various gas mixes, including trimix and CCR dives. It offers a suite of free utilities for gas analysis, usage, and buoyancy calculations, alongside educational content and a certification wallet. The premium version unlocks advanced planning features for complex dives.

Highlights
  • Open-circuit, trimix, and CCR dive planning
  • Automatic gas switching and unlimited segments
  • Offline functionality
  • Free dive utilities (gas analysis, usage, buoyancy)
  • Dive signals and cylinder specifications
  • Certification wallet
  • Multi-language support
Features
Read full description

The deco planner built for technical divers, plus eleven free tools for everyone on the boat. Dive Kit is a scuba deco planner for open-circuit, trimix and CCR dives on Bühlmann ZH-L16C with your gradient factors. It shows what every what-if costs: deeper, longer, a lost gas, a bailout from any point in the dive. Every number is explained, every setting travels with the plan, and your buddy opens it free in the app or in any browser. Everything runs offline. Big type for direct sun, big targets for wet hands, routine tasks in seconds. DECO PLANNER (PRO) The one tool you pay for. - Multi-level profiles with the deco woven around your levels: stops between levels when the plan needs them, gas switches placed where the PPO₂ allows - Gradient factors, last stop, ascent rates, air breaks, stop rounding (minute, 30 seconds or exact) and PPO₂ bands per gas, all set per plan - Contingency tabs: deeper, longer, lost gas, or build your own. Each shows the extra run time, TTS and CNS against the base plan - Modifiers: working and deco SRMV and a delay at depth, on the base plan or on one contingency - CCR: setpoint schedules by depth, diluent switches, dilout, and open-circuit bailout from the end of the profile, after any level, at a run time or on ascent - Gas per cylinder: remaining pressure at each stop, a reserve per cylinder, ascent pressure, and what happens when a cylinder runs dry - Live warnings with the limit, the number and the fix: PPO₂, END, gas density, CNS, OTU, hypoxia, reserve - Repetitive dives, with tissue loading carried over the surface interval - Plan variants side by side, graph overlays included - Share by QR code or link, no purchase needed to read it. Export the table or a slate image - Cross-checked against reference planners, stop for stop ELEVEN FREE TOOLS No ads, nothing behind a sign-up. - Best Mix: nitrox and trimix by MOD, helium picked by END, with narcotic and density limits - Gas Specs: EAD, PPO₂, END and gas density with color-coded warnings - Gas Usage: multi-level consumption, turn pressure, thirds to sixths - SAC/SRMV: your real breathing rate from a dive, doubles and sidemount included - Buoyancy: weighting from suit, body, gear and water, with lift and overweighting advisories - Blender: partial-pressure and continuous blending with real-gas corrections and expected analyzer readings - Mix Result: what a top-up or a decant actually gives you - Checklists: your own pre-dive routines and rebreather presets, with timers that survive closing the app - Cylinders, Converter, Signals. Cylinders named the way you buy them: AL80 at 3000 psi, or litres REFERENCE & LEARNING - 90+ illustrated, searchable dive signals - 35+ cylinder specifications from manufacturer data - Tutorials on gas physics, decompression theory and trimix - Tap any result for what it means and why it matters CERTIFICATION WALLET 25+ agencies, 190+ certifications, and a diver profile with insurance and emergency contacts. BUILT FOR THE BOAT - Fully offline, on phones and tablets - Exact decimal math in every gas number - Eight languages: English, German, Turkish, Swedish, Russian, Polish, Simplified Chinese, Korean - Light, dark and automatic themes No ads. No account. Your dive data stays on your device, and the optional usage analytics can be switched off in Settings. Dive Kit helps you plan and check your numbers. It does not replace training, certification or your own judgment. Analyze your gas, dive within your limits, plan conservatively. PRICING The Deco Planner is the only paid tool: a one-time lifetime purchase or a subscription. Everything else is free, for everyone. Built by a technical diver, shaped by recreational, trimix and rebreather divers and instructors. Privacy Policy: https://divekit.app/privacy-policy/ Terms of Service: https://divekit.app/terms/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Nitrox Tools4 screens
Dive Kit4 screens

Verdict

The call

The clearest difference is price: Dive Kit at Free against Nitrox Tools's $5.99. Dive Kit also leads on update cadence (every 3 days vs every 5 months) and review sentiment (100% vs 88%). Nitrox Tools's advantage is in-app purchases (none vs 3) and ratings volume (4 vs 1). On rating, ads and iOS requirement 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 Kit is free to download; Nitrox Tools costs $5.99 up front. Dive Kit sells 3 in-app purchases, starting at $4.99 per month. Nitrox Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Nitrox Tools against 5.0 for Dive Kit. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews are what separate them: 88% of Nitrox Tools's written reviews are positive against 100% of Dive Kit's.

UpkeepUpdate frequency

Nitrox Tools ships an update every 5 months, Dive Kit every 3 days. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

Scorecard7 real differences · 3 level
Nitrox Tools versus Dive Kit: the parameters behind the verdict, then further details
ParameterNitrox ToolsDive Kit
Price$5.99Free — better
Rating5.0 (4 ratings)5.0 (1 ratings)
Positive reviews88.5% of reviews100.0% of reviews — better
Number of ratings4 — better1
Update frequencyEvery 5 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.6 — better16.4
Further details — not scored
Size7 MB127 MB
Age rating4+4+
DeveloperGreg MclaughlinRONNY MAJANI

Customer experience

Nitrox Tools

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

Dive Kit

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Nitrox Tools

No in-app purchases

3 purchases

Dive Kit

Subscriptions1
  • Skuba Tools Pro Monthly1 Month trial$4.991 Month
One-time2
  • Tip$0.99
  • Decompression Planner$24.99

Questions

Is Nitrox Tools free?
Nitrox Tools costs $5.99, with no in-app purchases.
Is Dive Kit free?
Dive Kit is free to download, with in-app purchases available.
Which has better reviews, Nitrox Tools or Dive Kit?
Nitrox Tools and Dive Kit are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Nitrox Tools or Dive Kit have ads?
Neither Nitrox Tools nor Dive Kit shows ads.
Which is updated more often, Nitrox Tools or Dive Kit?
Nitrox Tools ships an update every 5 months, and Dive Kit every 3 days. Most recently, Nitrox Tools was updated on October 13, 2026 and Dive Kit on October 2, 2026.

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