# MemClean vs Useful QR Code Reader PRO

The clearest difference is price: MemClean at Free against Useful QR Code Reader PRO's $2.99. MemClean also leads on iOS requirement (11.0 vs 15.6). Useful QR Code Reader PRO's advantage is ads (none vs shown) and update cadence (every 10 days vs every 4 months). On in-app purchases and device support there is nothing between them.

MemClean is free to download; Useful QR Code Reader PRO costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MemClean ships an update every 4 months, Useful QR Code Reader PRO every 10 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | MemClean | Useful QR Code Reader PRO |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.2 (109 ratings)](https://appshunter.io/ios/app/memclean/id1664102118/reviews)** | — |
| Number of ratings | **109** | — |
| Positive reviews | 78.9% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Ad-supported | — |
| Size | 15 MB | 43 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Martin Dimitrov](https://appshunter.io/developer/1427986114) | [katapu.net](https://appshunter.io/developer/381898924) |

## What reviewers say

### MemClean

[App page](https://appshunter.io/ios/app/memclean/id1664102118)

This utility tool helps improve device performance by freeing up RAM memory. It addresses sluggishness and lagging, offering a boost to your device's responsiveness. Compatible with devices running iOS 11 and later.

**Highlights:** Frees up RAM memory, Boosts device performance, Reduces sluggishness and lagging, Supports iOS 11 and later

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and efficient RAM cleaning
- 💰 Completely free with optional donations
- 👍 Simple and user-friendly interface
- ✅ Actually works as advertised
- 🔄 Regular updates for iOS compatibility

**What reviewers complain about**

- 📺 Advertisements present in app
- ❓ Unclear how the cleaning actually works
- 🔄 Results may be temporary without addressing root causes
- 🌍 Not available in all languages
- ⚠️ Limited aggressive cleaning options

**Reported bugs**

- App crashes on iPad Pro 2021 with iOS 15.1
- Crashes during cleaning process
- Video ads freeze the app
- False 'memory low' popup messages
- Inconsistent cleaning results across devices

**Requested features**

- Automatic background app closing
- Auto-run scheduler (hourly or customizable)
- More aggressive deep cleaning mode
- Display which apps are consuming RAM
- Gaming mode optimization


### Useful QR Code Reader PRO

[App page](https://appshunter.io/ios/app/useful-qr-code-reader-pro/id6738622977)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MemClean free?

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

### Is Useful QR Code Reader PRO free?

Useful QR Code Reader PRO costs $2.99, with no in-app purchases.

### Do MemClean or Useful QR Code Reader PRO have ads?

MemClean shows ads; Useful QR Code Reader PRO does not.

### Which is updated more often, MemClean or Useful QR Code Reader PRO?

MemClean ships an update every 4 months, and Useful QR Code Reader PRO every 10 days. Most recently, MemClean was updated on November 3, 2026 and Useful QR Code Reader PRO 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.*