Nitrox Buddy vs Dive Check
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
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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.
Dive Check
Create and share comprehensive gear checklists for diving trips. Ensure nothing is forgotten with customizable lists and reminders. Perfect for divers, snorkelers, and anyone carrying extensive equipment.
- Create custom checklists
- Share lists with friends
- Set reminders
- Use default checklists
- Edit and modify lists
- Add new items
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Dive Check is useful and simple to use application for creating checklists for scuba divers, technical divers, snorkelers and everyone else who carries a lot of gear on locations, and needs to make sure that nothing is forgotten, or misplaced. Did you ever want to send a list of equipment to your dive buddy or friend, so they don't forget something on the next diving trip? With Dive Check you can create a list and share it with as many friends as you want to, set reminders, and never miss a dive due to forgotten equipment or gear. - Use Default Checklists - Create Reminders - Create Empty or Template Checklists - Edit, Delete, or Modify Checklists - Add New Items in Checklists - Send (Share) Checklists with friends Enjoy Dive Check, and Safe Diving!
Screenshots
Verdict
The clearest difference is review sentiment: Nitrox Buddy at 96% against Dive Check's 50%. Nitrox Buddy also leads on rating (4.9 vs 1.0) and ratings volume (489 vs 2). Dive Check's advantage is update cadence (every 4 days vs every 7 months) and iOS requirement (8.0 vs 26.0). On price, ads, in-app purchases and monetization model 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 and Dive Check sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Nitrox Buddy holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Nitrox Buddy has 489 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 96% of Nitrox Buddy's written reviews are positive against 50% of Dive Check's.
Nitrox Buddy ships an update every 7 months, Dive Check every 4 days. The most recent releases landed on October 17, 2026 and September 27, 2026 respectively.
| Parameter | Nitrox Buddy | Dive Check |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (489 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 95.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 489 — better | 2 |
| Update frequency | Every 7 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Gereon Steffens | AXIS Productions |
Customer experience
Nitrox Buddy
Dive Check
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)
Dive Check
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nitrox Buddy
- Tip$0.99
Dive Check
- Dive Check Full Version$2.99
