# QR & Barcode Reader Writer vs HydroTimer

The clearest difference is ads: HydroTimer at none against QR & Barcode Reader Writer's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QR & Barcode Reader Writer ships an update every 6 months, HydroTimer every 10 months. The most recent releases landed on October 10, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | QR & Barcode Reader Writer | HydroTimer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 months** | Every 10 months |
| Size | 19 MB | 2 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nobutaka Yuasa](https://appshunter.io/developer/1077141399) | [Aurelis Limited](https://appshunter.io/developer/1821243565) |

## What reviewers say

### QR & Barcode Reader Writer

[App page](https://appshunter.io/ios/app/qr-and-barcode-reader-writer/id1107409513)

**In-app purchases:** none


### HydroTimer

[App page](https://appshunter.io/ios/app/hydrotimer/id6748376181)

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

**In-app purchases:** none


## Frequently asked questions

### Is QR & Barcode Reader Writer free?

QR & Barcode Reader Writer is free to download, with no in-app purchases.

### Is HydroTimer free?

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

### Do QR & Barcode Reader Writer or HydroTimer have ads?

QR & Barcode Reader Writer shows ads; HydroTimer does not.

### Which is updated more often, QR & Barcode Reader Writer or HydroTimer?

QR & Barcode Reader Writer ships an update every 6 months, and HydroTimer every 10 months. Most recently, QR & Barcode Reader Writer was updated on October 10, 2026 and HydroTimer on October 18, 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.*