Nitrox Buddy vs ATMOS
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.
ATMOS
This app wirelessly syncs dive logs from compatible dive computers. Users can view device information, edit dive log details, and export data in UDDF format. It also integrates with HealthKit to share dive-related health metrics.
- Wireless dive log sync
- Device information check
- Edit dive log details
- Export to UDDF format
- HealthKit integration
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ATMOS App is the best companion of Mission One and Mission2, Mission3 dive computer. You can use ATMOS App to : ● Wirelessly sync your device's divelogs. ● Check device information. ● Edit divelog information. ● Export divelog to UDDF format. ATMOS use HealthKit to export your Mission2 health data (Steps, Calories, Sleep, Heart rate) into the Health app. Official website : https://www.atmos.app FaceBook fan page: https://www.facebook.com/atmosocean/ Follow us on Instagram : @atmos_ocean
Screenshots
Verdict
The clearest difference is review sentiment: Nitrox Buddy at 96% against ATMOS's 8%. Nitrox Buddy also leads on rating (4.9 vs 1.7) and ratings volume (490 vs 23). ATMOS's advantage is in-app purchases (none vs 1) and update cadence (every 5 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. ATMOS asks for nothing beyond the download.
Nitrox Buddy holds the better App Store score, 4.9 against 1.7. That said, the two scores are not equally well evidenced: Nitrox Buddy has 490 ratings behind it against 23, 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 8% of ATMOS's.
Nitrox Buddy ships an update every 7 months, ATMOS every 5 weeks. Both last shipped on October 24, 2026.
| Parameter | Nitrox Buddy | ATMOS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (490 ratings) — better | 1.7 (23 ratings) |
| Positive reviews | 95.8% of reviews — better | 7.7% of reviews |
| Number of ratings | 490 — better | 23 |
| Update frequency | Every 7 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 26.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 125 MB |
| Age rating | 4+ | 4+ |
| Developer | Gereon Steffens | ATMOS CO., LTD. |
Customer experience
Nitrox Buddy
ATMOS
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)
ATMOS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nitrox Buddy
- Tip$0.99
ATMOS
No in-app purchases
Questions
Is Nitrox Buddy free?
Is ATMOS free?
Which has better reviews, Nitrox Buddy or ATMOS?
Do Nitrox Buddy or ATMOS have ads?
Which is updated more often, Nitrox Buddy or ATMOS?
Other comparisons
