Comparison

nitroxCalc vs Simple Nitrox

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

Head to head

Calculate MOD and Best Nx%

Free

⚽ Sports

No ratingsView app →

About

nitroxCalc

Features

Read full description

A very simple application for calculating the maximum possible depth with the nitrox you choose

About

Simple Nitrox

Features

Read full description

Simple Nitrox provides an easy to use and very visible calculation of Maximum Operating Depth for scuba diving. The most appropriate nitrox mix can also be calculated for a planned depth. Widgets can be added to the Home Screen for up to 5 tanks for easy access to the values for previously analysed tanks and the application. Supports metric and imperial, and o2 up to 99%.

Screenshots

nitroxCalc3 screens

Simple Nitrox3 screens

Verdict

The call

The clearest difference is in-app purchases: nitroxCalc at none against Simple Nitrox's 1. nitroxCalc also leads on iOS requirement (9.0 vs 16.0). On price, update cadence, 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. Simple Nitrox sells 1 one-off in-app purchase. nitroxCalc asks for nothing beyond the download.

UpkeepUpdate frequency

nitroxCalc ships an update every 18 months, Simple Nitrox every 29 months. The most recent releases landed on September 8, 2026 and September 12, 2026 respectively.

Scorecard2 real differences · 4 level

nitroxCalc versus Simple Nitrox: the parameters behind the verdict, then further details
Parameter	nitroxCalc	Simple Nitrox
Price	Free	Free
Update frequency	Every 18 months — better	Every 29 months
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPod — better	iPhone
Requires iOS	9.0 — better	16.0
Further details — not scored
Size	5 MB	2 MB
Age rating	4+	4+
Developer	CAP-REL	Simon Chivers

In-app purchases

None

nitroxCalc

No in-app purchases

1 purchases

Simple Nitrox

One-time1

Simple Nitrox Full Access$0.99

Questions

Is nitroxCalc free?

nitroxCalc is free to download, with no in-app purchases.

Is Simple Nitrox free?

Simple Nitrox is free to download, with in-app purchases available.

Do nitroxCalc or Simple Nitrox have ads?

Neither nitroxCalc nor Simple Nitrox shows ads.

Which is updated more often, nitroxCalc or Simple Nitrox?

nitroxCalc ships an update every 18 months, and Simple Nitrox every 29 months. Most recently, nitroxCalc was updated on September 8, 2026 and Simple Nitrox on September 12, 2026.