Comparison

Nitrox Buddy vs DiveHub

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read 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.

About

DiveHub

Features
Read full description

EDUCATIONAL PURPOSE ONLY - NOT FOR REAL DIVE PLANNING DiveHub is a fan project created to help divers learn and understand decompression theory. This app implements the Bühlmann ZH-L16C algorithm with gradient factors, but lacks many features required for safe, real-world dive planning. Key Features: • Bühlmann ZH-L16C Decompression Algorithm • Gradient Factor support (customizable GF Low/High) • Open Circuit (OC) multi-gas planning • Closed Circuit Rebreather (CCR) support with bailout planning • Multiple decompression gases • Real-time dive profile visualization • Equivalent Narcotic Depth (END) calculations • Gas density monitoring with safety thresholds • Time To Surface (TTS) calculations • Customizable ascent/descent rates • Altitude diving support with custom surface pressure • Fresh water and salt water density options • Save and manage multiple dive plans • Some level of Gas Planning • BLE Nitrox Analyzer Not included features: • Complete Gas planning feature • ICBD warning, HPNS warning • etc. Technical Diving Concepts: Learn about decompression stops, tissue compartment loading, gas switching protocols, ppO2 limits, Maximum Operating Depth (MOD), CNS oxygen toxicity tracking, and CCR bailout planning. Important Safety Notice: This app is for educational purposes only. It does not account for all physiological factors, environmental conditions, or emergency scenarios. You must be properly trained in decompression theory and dive planning. Only dive within your certified training level. All dives carry risk of Decompression Sickness (DCS), which can cause serious injury or death. The developers are not responsible for any injuries or incidents resulting from using this application. You assume all risks associated with diving. Requirements: • Full understanding of diving terms and decompression theory • Proper dive training and certification • Use alongside professional dive computers and planning tools

Screenshots

Nitrox Buddy4 screens
DiveHub4 screens

Verdict

The call

The clearest difference is in-app purchases: DiveHub at none against Nitrox Buddy's 1. DiveHub also leads on update cadence (every 8 days vs every 7 months) and iOS requirement (18.6 vs 26.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase. DiveHub asks for nothing beyond the download.

UpkeepUpdate frequency

Nitrox Buddy ships an update every 7 months, DiveHub every 8 days. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 7 level
Nitrox Buddy versus DiveHub: the parameters behind the verdict, then further details
ParameterNitrox BuddyDiveHub
PriceFreeFree
Rating4.9 (490 ratings) — better—
Positive reviews95.8% of reviews—
Number of ratings490 — better—
Update frequencyEvery 7 monthsEvery 8 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS26.018.6 — better
Further details — not scored
Size6 MB10 MB
Age rating4+4+
DeveloperGereon SteffensXIN LI

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)

DiveHub

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Nitrox Buddy

One-time1
  • Tip$0.99
None

DiveHub

No in-app purchases

Questions

Is Nitrox Buddy free?
Nitrox Buddy is free to download, with in-app purchases available.
Is DiveHub free?
DiveHub is free to download, with no in-app purchases.
Do Nitrox Buddy or DiveHub have ads?
Neither Nitrox Buddy nor DiveHub shows ads.
Which is updated more often, Nitrox Buddy or DiveHub?
Nitrox Buddy ships an update every 7 months, and DiveHub every 8 days. Most recently, Nitrox Buddy was updated on November 6, 2026 and DiveHub on November 9, 2026.

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