# nitroxCalc vs Simple Nitrox

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.

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

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.

## The numbers

| Metric | nitroxCalc | Simple Nitrox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 18 months** | Every 29 months |
| Size | 5 MB | 2 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CAP-REL](https://appshunter.io/developer/1405536766) | [Simon Chivers](https://appshunter.io/developer/1698955737) |

## What reviewers say

### nitroxCalc

[App page](https://appshunter.io/ios/app/nitroxcalc/id1408060704)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Nitrox

[App page](https://appshunter.io/ios/app/simple-nitrox/id6463395880)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple Nitrox Full Access | $0.99 | one-time |


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*