Comparison

Nitrox Buddy vs Pro Dive

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

Head to head
About

Nitrox Buddy

This application serves as a straightforward calculator for nitrox and enriched air divers. It quickly computes essential dive data such as Maximum Operating Depth (MOD), Equivalent Air Depth (EAD), Best Mix, and Partial Pressure of Oxygen (PPO2). It supports both imperial and metric units and offers a companion watch app for on-the-go calculations.

Highlights
  • Calculate MOD, EAD, Best Mix, PPO2
  • Imperial and metric unit support
  • Sea and fresh water options
  • Selectable max oxygen content
  • Selectable max partial pressure
  • Companion watch app
Features
Read full description

Nitrox Buddy is a no-frills calculator app for nitrox/enriched air divers - use it to quickly calculate the most important data for your dive: Maximum Operating Depth/MOD, Equivalent Air Depth/EAD, Best Mix and PPO2. The app works with imperial or metric measurements, sea or fresh water, and allows you to select the maximum oxygen content and partial pressure. A companion watch app puts lets you perform all these calculations on your wrist.

About

Pro Dive

Features
Read full description

Pro Dive continuously tracks your depth, time, ascent rate and tissue loading to keep you informed throughout every dive. Real-Time Dive Computer • Certified to EN13319 — the international standard for dive instruments. • Live depth display • No-Deco Limit (NDL) • Decompression ceiling and Time-To-Surface (TTS) estimates • Gradient Factors and multi gas support (Nitrox / Trimix capable engine) • CCR support with fixed PPO2 and Bail Out modes • Ascent-rate tracking with smart averaging • Automatically detects submersion and starts logging • Underwater Compass • Indicates no fly time Decompression Model Built on the Bühlmann ZH-L16C model with gradient factors, Pro Dive continuously updates a full 16-compartment tissue model during your dive — just like a dedicated dive computer. Automatic Dive Logs Every dive is saved automatically and synced to your iPhone: • Full dive profile graph • Max depth, duration, start/end times • Min/max temperature • Location via GPS + reverse geocoding • Notes and dive-day details • All logs stored locally with optional cloud backup (if applicable) Designed for Apple Watch Ultra Pro Dive is built specifically for the Ultra’s: • Depth and water-temperature sensors • Bright always-on display • Large Action Button and crown to quickly select options underwater • Rugged dive-ready design Offline, Reliable, and Fast All calculations run entirely on the watch — no signal required. Your watch keeps logging even if the iPhone is not nearby. For Recreational and Technical Divers Whether you’re practising buoyancy in the pool, exploring a wreck, or building up to technical training, Pro Dive provides a clean, modern interface with professional-grade dive calculations behind it. Privacy Policy - https://www.tec-diver.eu/pro-dive-privacy-policy.html End User License Agreement - Privacy Policy - http://www.tec-diver.eu/easy-deco-privacy-policy.html

Screenshots

Nitrox Buddy4 screens
Pro Dive4 screens

Verdict

The call

The clearest difference is update cadence: Pro Dive at every 5 weeks against Nitrox Buddy's every 7 months. Pro Dive also leads on iOS requirement (18.0 vs 26.0). On price, 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

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase and Pro Dive sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Nitrox Buddy ships an update every 7 months, Pro Dive every 5 weeks. The most recent releases landed on September 25, 2026 and September 29, 2026 respectively.

Scorecard2 real differences · 8 level
Nitrox Buddy versus Pro Dive: the parameters behind the verdict, then further details
ParameterNitrox BuddyPro Dive
PriceFreeFree
Rating4.9 (468 ratings) — better—
Positive reviews95.7% of reviews—
Number of ratings468 — better—
Update frequencyEvery 7 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS26.018.0 — better
Further details — not scored
Size6 MB32 MB
Age rating4+4+
DeveloperGereon SteffensMillennium Ltd

Bugs and requests

Nitrox Buddy

Reported bugs

4 issues
  • iPad icon is ugly
  • MOD limit of 50% O2 despite 100% O2 setting (resolved)
  • MOD limit of 40% O2 (older version)
  • Does not work with older iOS versions

Requested features

4 requests
  • Add MOD 1.5 option
  • Allow MOD calculation up to 100% O2 and indicate max exposure duration
  • Change color for inappropriate mixes (e.g., 50% at 40m)
  • Support older iOS versions (5 & 6)

Pro Dive

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Nitrox Buddy

One-time1
  • Tip$0.99
3 purchases

Pro Dive

Subscriptions2
  • Pro Dive monthly$6.991 Month
  • Pro Dive anual$59.991 Year
One-time1
  • Pro Dive Lifetime$139.99

Questions

Is Nitrox Buddy free?
Nitrox Buddy is free to download, with in-app purchases available.
Is Pro Dive free?
Pro Dive is free to download, with in-app purchases available.
Do Nitrox Buddy or Pro Dive have ads?
Neither Nitrox Buddy nor Pro Dive shows ads.
Which is updated more often, Nitrox Buddy or Pro Dive?
Nitrox Buddy ships an update every 7 months, and Pro Dive every 5 weeks. Most recently, Nitrox Buddy was updated on September 25, 2026 and Pro Dive on September 29, 2026.

Other comparisons