Nitrox Buddy vs DeepLog
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.
DeepLog
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The dive log you will actually use. Log a dive in seconds: depth, bottom time, gas mix, temperature, visibility, buddy and photos. Nitrox calculator, gear service tracking, certification cards and a map of every site, all in one clean app. DeepLog is the cleanest, simplest scuba dive logging app built for divers who actually want to use it — not fight with it. Whether you're logging your first open water dive or your 500th wreck dive, DeepLog keeps everything organized, beautiful, and fast. LOG YOUR DIVES Track everything that matters — depth, bottom time, gas mix, water temp, visibility, buddy, rating, and notes. Your complete dive history, always at your fingertips. TRACK YOUR GEAR Never miss a service date again. Log your equipment, track service intervals, and see what's due before your next dive trip. PRE-DIVE CHECKLIST Run through your gear checks before every dive. Customize the list, add your own items, and get that all-clear feeling before you hit the water. CERTIFICATION CARDS Store photos of your dive certification cards right in the app. Never show up to a dive boat without proof of cert again. GAS CALCULATOR Built-in nitrox calculator for Air, EAN32, EAN36, or custom mixes. Instantly calculate PPO2, MOD, EAD, and no-decompression limits. DIVE SITE MAP (Premium) See every dive site you've ever visited plotted on a beautiful world map. Watch your underwater world grow with every dive. DIVE CONDITIONS (Premium) Check water temperature, swell, waves, wind and gusts at your dive site, plus a 3-day outlook to help you plan your next dive. BACKUP & RESTORE Back up your whole log, including every photo, gear item and cert card, to Files, iCloud Drive or email, and restore it on any device. EXPORT YOUR DATA (Premium) Export your full dive log as a CSV anytime. Your data is always yours. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: DeepLog at every 3 weeks against Nitrox Buddy's every 7 months. DeepLog also leads on iOS requirement (15.1 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
Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase and DeepLog sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Nitrox Buddy ships an update every 7 months, DeepLog every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Nitrox Buddy | DeepLog |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (490 ratings) — better | — |
| Positive reviews | 95.8% of reviews | — |
| Number of ratings | 490 — better | — |
| Update frequency | Every 7 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Gereon Steffens | Steven Saccio Photography LLC |
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)
DeepLog
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nitrox Buddy
- Tip$0.99
DeepLog
- DeepLog Premium$1.991 Month
