# Gas Manager vs QR Code Scanner by NFC.cool

The clearest difference is price: QR Code Scanner by NFC.cool at Free against Gas Manager's $2.99. QR Code Scanner by NFC.cool also leads on update cadence (every 4 days vs every 4 months) and iOS requirement (17.0 vs 26.0). Gas Manager's advantage is ads (none vs shown) and rating (4.0 vs 3.7). On ratings volume, in-app purchases and device support there is nothing between them.

QR Code Scanner by NFC.cool is free to download; Gas Manager costs $2.99 up front. Gas Manager sells 3 one-off in-app purchases and QR Code Scanner by NFC.cool sells 7 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Gas Manager holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Gas Manager ships an update every 4 months, QR Code Scanner by NFC.cool every 4 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Gas Manager | QR Code Scanner by NFC.cool |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/gas-manager-nitrox-and-trimix/id500438406/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/qr-code-scanner-by-nfccool/id6745910962/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 16 MB | 30 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ryan Booker](https://appshunter.io/developer/1200695611) | [Nicolo Stanciu](https://appshunter.io/developer/930855677) |

## What reviewers say

### Gas Manager

[App page](https://appshunter.io/ios/app/gas-manager-nitrox-and-trimix/id500438406)

This app provides tools for planning and blending diving gases, including nitrox and trimix. It offers calculators for partial pressure blending, top-offs, and best mixes, along with calculations for MOD, END, EAD, and EDD.

**Highlights:** Nitrox and trimix partial pressure blending, Top off calculator, Best mix calculator, MOD calculation, END, EAD, and EDD calculation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leave an Espresso Sized Tip | $2.99 | one-time |
| Tip a Bag of Beans | $8.99 | one-time |
| Tip a Big Bag of Beans | $29.99 | one-time |


### QR Code Scanner by NFC.cool

[App page](https://appshunter.io/ios/app/qr-code-scanner-by-nfccool/id6745910962)

Easily scan, create, and manage QR codes with this comprehensive utility. Features real-time detection, custom code generation, and organization tools. Supports iPhone and iPad with dark mode.

**Highlights:** Fast QR code scanning, Create custom QR codes, Save and organize scanned codes, Share QR codes, Dark mode support, Batch scanning mode

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $0.99 | per 7 days |
| Mini Monthly | $1.49 | per month |
| Premium Monthly | $1.99 | per month |
| Mini Yearly | $9.99 | per year |
| Premium Yearly | $14.99 | per year |
| Mini Lifetime | $9.99 | one-time |
| Premium Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Gas Manager free?

Gas Manager costs $2.99, and also offers in-app purchases.

### Is QR Code Scanner by NFC.cool free?

QR Code Scanner by NFC.cool is free to download, with in-app purchases available.

### Which has better reviews, Gas Manager or QR Code Scanner by NFC.cool?

Gas Manager is rated higher. Gas Manager averages 4.0 out of 5 from 2 ratings, while QR Code Scanner by NFC.cool averages 3.7 from 3 ratings.

### Do Gas Manager or QR Code Scanner by NFC.cool have ads?

QR Code Scanner by NFC.cool shows ads; Gas Manager does not.

### Which is updated more often, Gas Manager or QR Code Scanner by NFC.cool?

Gas Manager ships an update every 4 months, and QR Code Scanner by NFC.cool every 4 days. Most recently, Gas Manager was updated on November 1, 2026 and QR Code Scanner by NFC.cool on October 30, 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.*