# Brain training calculator vs QR Mastery

The clearest difference is in-app purchases: Brain training calculator at none against QR Mastery's 3. Brain training calculator also leads on device support (3 vs 1) and iOS requirement (15.8.3 vs 26.0). QR Mastery's advantage is ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price there is nothing between them.

Both are free to download. QR Mastery sells 3 in-app purchases, starting at $9.99 per 7 days. Brain training calculator asks for nothing beyond the download.

Brain training calculator ships an update every 2 weeks, QR Mastery every 3 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Brain training calculator | QR Mastery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (58 ratings)](https://appshunter.io/ios/app/qr-mastery/id6757982998/reviews)** |
| Number of ratings | — | **58** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 39 MB |
| Requires iOS | **15.8.3** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [WARESOUL](https://appshunter.io/developer/1859178273) |

## What reviewers say

### Brain training calculator

[App page](https://appshunter.io/ios/app/brain-training-calculator/id6502152942)

**Features:** macOS Compatibility

**In-app purchases:** none


### QR Mastery

[App page](https://appshunter.io/ios/app/qr-mastery/id6757982998)

Instantly scan and create custom QR codes for various purposes. This app supports barcode scanning, offers a scan history, and allows for gallery imports. Personalize your experience with beautiful themes and unlock premium features for an enhanced QR code management solution.

**Highlights:** Instant QR code scanning, Barcode format support, Custom QR code creation, Scan history tracking, Gallery image import, App theme customization

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $9.99 | per 7 days |
| Premium Monthly | $19.99 | per month |
| Premium Yearly | $24.90 | per year |


## Frequently asked questions

### Is Brain training calculator free?

Brain training calculator is free to download, with no in-app purchases.

### Is QR Mastery free?

QR Mastery is free to download, with in-app purchases available.

### Do Brain training calculator or QR Mastery have ads?

Brain training calculator shows ads; QR Mastery does not.

### Which is updated more often, Brain training calculator or QR Mastery?

Brain training calculator ships an update every 2 weeks, and QR Mastery every 3 days. Most recently, Brain training calculator was updated on November 4, 2026 and QR Mastery on November 5, 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.*