Comparison

Nitrox Buddy vs Diving Calculator

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

Diving Calculator

Read full description

Diving Calculator is an app designed for divers of all levels who seek to simplify the necessary calculations for a safe and efficient dive. The app includes several tools that allow users to calculate air consumption, determine the maximum dive depth without needing to make decompression stops, and ensure they have all the necessary equipment for their underwater adventure. On the main screen, the Diving Calculator allows users to access three main features: Dive Time Calculator: This tool allows the diver to input data such as air tank capacity, initial pressure, and depth to calculate how many liters of air will be consumed during the dive and how many bars the tank should have before diving. Decompression Stop Calculator: Based on the depth and dive time, the app simulates the behavior of a dive computer, providing the user with the necessary information to know how long they can stay at a given depth without making decompression stops. Equipment Checklist: The app includes a complete checklist with all the essential gear for a safe dive. From the regulator to the wetsuit, users can ensure they don't forget any equipment before getting into the water. The design of the Diving Calculator is visually appealing, using blue tones that evoke the underwater environment. The interface is intuitive, allowing both novice and experienced divers to use the app without complications. This tool is an indispensable companion for planning safe dives, allowing users to focus on enjoying their underwater experience, knowing they have performed all the key calculations accurately. Diving Calculator is an essential tool for any diving enthusiast who wants to ensure their safety underwater, optimizing air consumption and minimizing risks during the dive.

Screenshots

Nitrox Buddy4 screens
Diving Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Diving Calculator at none against Nitrox Buddy's 1. Diving Calculator also leads on update cadence (weekly vs every 7 months) and iOS requirement (12.0 vs 26.0). On price, 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

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase. Diving Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Nitrox Buddy ships an update every 7 months, Diving Calculator weekly. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Nitrox Buddy versus Diving Calculator: the parameters behind the verdict, then further details
ParameterNitrox BuddyDiving Calculator
PriceFreeFree
Rating4.9 (468 ratings) — better—
Positive reviews95.7% of reviews—
Number of ratings468 — better—
Update frequencyEvery 7 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS26.012.0 — better
Further details — not scored
Size6 MB33 MB
Age rating4+4+
DeveloperGereon SteffensAlberto Segovia

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)

Diving Calculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Nitrox Buddy

One-time1
  • Tip$0.99
None

Diving Calculator

No in-app purchases

Questions

Is Nitrox Buddy free?
Nitrox Buddy is free to download, with in-app purchases available.
Is Diving Calculator free?
Diving Calculator is free to download, with no in-app purchases.
Do Nitrox Buddy or Diving Calculator have ads?
Neither Nitrox Buddy nor Diving Calculator shows ads.
Which is updated more often, Nitrox Buddy or Diving Calculator?
Nitrox Buddy ships an update every 7 months, and Diving Calculator weekly. Most recently, Nitrox Buddy was updated on October 14, 2026 and Diving Calculator on October 6, 2026.

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