Nitrox Buddy vs DiveSync
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.
DiveSync
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Introduction: DiveSync is a free mobile app that connects your mobile device to your dive computer to manage and organize your precious dive data. DiveSync enables users to view, edit, and analyze previous dives, add locations and photos, and easily update the dive computer firmware. DiveSync is compatible with select dive computers from Cressi, Genesis, OceanPro, Sherwood, and XS Scuba. Key Features: Dive Log: Download, view, and manage your dive logs from your dive computer to your mobile device. Automatically download dives or manually add them to create an extensive logbook. Data: Analyze data such as dive time, max depth, tissue loading, ascent rates, and much more. Dive profiles can be viewed in both graphical and tabular formats. Planning: Set alerts for time and depth, set gas mixes, and manage your dive profile. Customization: Add memos, dive spots, dive photos, and observations. Dive Spots: Accurately add dive locations via Apple Maps. DC Control: Set device settings for your dive computer and perform firmware updates. Bluetooth: Transfer dive data from your dive computer using Bluetooth 5.0 ensuring fast download and upload times. Compatibility: Currently supports Cressi Davinci, XS Scuba Skiff, Oceanpro Spirit, Genesis Graviton, Sherwood Logic+ and Sherwood Wisdom 5 Supported Mobile Platforms: iOS. Summary: DiveSync is a free iOS dive log app that allows you to access and download your dive logs using a streamlined interface and user experience. Automatically download new dives or manually input information with compatible Bluetooth LE enabled dive computers from Cressi, XS Scuba, and Oceanpro. (Currently compatible models include the Cressi Davinci, XS Scuba Skiff, Oceanpro Spirit, Genesis Graviton, Sherwood Logic+, and Sherwood Wisdom 5) To get support from the developers, please use the in-app menu to “Send to Tech Support” and reach out to support@divesync.io. Additional troubleshooting and FAQs may be found directly at the DiveSync website. (www.divesync.io) DiveSync is free and all data is stored locally on your device. Your dive data is not used for any commercial purpose and is not monetized.
Screenshots
Verdict
The clearest difference is in-app purchases: DiveSync at none against Nitrox Buddy's 1. DiveSync also leads on update cadence (every 2 weeks vs every 7 months) and iOS requirement (16.5 vs 26.0). Nitrox Buddy's advantage is device support (3 vs 1). On price and ads 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. DiveSync asks for nothing beyond the download.
Nitrox Buddy ships an update every 7 months, DiveSync every 2 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | Nitrox Buddy | DiveSync |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (468 ratings) — better | — |
| Positive reviews | 95.7% 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 | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone |
| Requires iOS | 26.0 | 16.5 — better |
| Further details — not scored | ||
| Size | 6 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Gereon Steffens | Proasia Design Co. Ltd |
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)
DiveSync
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nitrox Buddy
- Tip$0.99
DiveSync
No in-app purchases
Questions
Is Nitrox Buddy free?
Is DiveSync free?
Do Nitrox Buddy or DiveSync have ads?
Which is updated more often, Nitrox Buddy or DiveSync?
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