# Scent Harmony vs QR Code ReaderⓇ

The clearest difference is in-app purchases: Scent Harmony at none against QR Code ReaderⓇ's 3. Scent Harmony also leads on iOS requirement (9.0 vs 13.4). QR Code ReaderⓇ's advantage is update cadence (every 4 months vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. QR Code ReaderⓇ sells 3 in-app purchases, starting at $3.99 per month. Scent Harmony asks for nothing beyond the download.

Scent Harmony ships an update every 11 months, QR Code ReaderⓇ every 4 months. The most recent releases landed on September 13, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Scent Harmony | QR Code ReaderⓇ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 months** |
| Size | 4 MB | 24 MB |
| Requires iOS | **9.0** | 13.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Immaculate Nduta](https://appshunter.io/developer/1620860472) | [WuHan ChongYue Future Technology Co., Ltd.](https://appshunter.io/developer/1751681836) |

## What reviewers say

### Scent Harmony

[App page](https://appshunter.io/ios/app/scent-harmony/id1670604472)

**Features:** macOS Compatibility

**In-app purchases:** none


### QR Code ReaderⓇ

[App page](https://appshunter.io/ios/app/qr-code-reader/id6572291980)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $14.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Scent Harmony free?

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

### Is QR Code ReaderⓇ free?

QR Code ReaderⓇ is free to download, with in-app purchases available.

### Do Scent Harmony or QR Code ReaderⓇ have ads?

Neither Scent Harmony nor QR Code ReaderⓇ shows ads.

### Which is updated more often, Scent Harmony or QR Code ReaderⓇ?

Scent Harmony ships an update every 11 months, and QR Code ReaderⓇ every 4 months. Most recently, Scent Harmony was updated on September 13, 2026 and QR Code ReaderⓇ on September 27, 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.*