Nitrox Buddy vs IDDA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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.
IDDA
This platform offers e-learning content and certifications to enhance diving knowledge and prepare for exams. It's designed to make learning and exam preparation more accessible for divers. Future updates promise even more features to support your diving journey.
- E-learning content
- Brevet platform
- Diving knowledge enhancement
- Exam preparation
- Accessible learning
Read full descriptionHide full description
The IDDA App is a learning and brevet platform that provides e-learning content and brevets. With the app, users can deepen their diving knowledge and prepare for exams. The next updates of the app will include many new features that will make learning and preparing for exams even easier and more accessible. The IDDA app is a valuable tool for all divers who want to expand their diving knowledge and start their diving adventure
Screenshots
Verdict
The clearest difference is review sentiment: Nitrox Buddy at 96% against IDDA's 0%. IDDA's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 7 months). 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
Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase. IDDA asks for nothing beyond the download.
Nitrox Buddy ships an update every 7 months, IDDA every 2 weeks. The most recent releases landed on September 25, 2026 and September 17, 2026 respectively.
| Parameter | Nitrox Buddy | IDDA |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (468 ratings) — better | — |
| Positive reviews | 95.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 468 — better | — |
| Update frequency | Every 7 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 26.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 6 MB | 37 MB |
| Age rating | 4+ | 12+ |
| Developer | Gereon Steffens | IDDA GmbH |
Customer experience
Nitrox Buddy
IDDA
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)
IDDA
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nitrox Buddy
- Tip$0.99
IDDA
No in-app purchases
