Comparison

MemClean vs Useful QR Code Reader PRO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MemClean

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
Read full description

Your device feels sluggish and lags? Boost it with MemClean. MemClean is application that frees up RAM memory. Now supports devices back to iOS 11.

About

Useful QR Code Reader PRO

Features
Read full description

A convenient QR Code Reader app has been released! This app is an easy, simple, and fast QR code reading application. Additionally, it is a handy QR code reader app that records your scan history. After launching the app, grant camera access, hold your device over a QR code, and scan it. The scanned QR code will be displayed at the top of the main screen. Tap it to open the browser and view the URL, or long-press to copy it to the clipboard and use the text as needed. After launching, tap the "Load Image" button and grant access to your photo library. Then, load an image containing a QR code, such as a screenshot, and the app will scan the QR code within the image. (In some cases, it may fail to read due to errors.) ※The 'PRO' version is a paid version without ads. The app's functionality is the same as the free version. [How to Use] - Point the camera at a QR code on the initial screen to scan it. - The top right button on the screen transitions to the main screen but skips QR code scanning. - The top left button on the screen scans a QR code from an image in the photo library. - The scanned content is displayed at the top of the main screen. - Tap to open the browser. - Long-press to copy to the clipboard. - QR code scan history is displayed at the bottom of the screen. - Delete all history with "Delete All History." - You can delete history individually. - Tapping on history entries also opens the browser. - Long-pressing history entries copies them to the clipboard. - Tap the "I" in the top right to view information about the app. - Use the back arrow in the top left to return to the initial QR code scanning screen. That's how to use the app. It is a simple, convenient, and fast QR code reading app! Download and try it today!

Screenshots

MemClean3 screens
Useful QR Code Reader PRO4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
MemClean versus Useful QR Code Reader PRO: the parameters behind the verdict, then further details
ParameterMemCleanUseful QR Code Reader PRO
PriceFree — better$2.99
Rating4.2 (109 ratings) — better—
Positive reviews78.9% of reviews—
Number of ratings109 — better—
Update frequencyEvery 4 monthsEvery 10 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.6
Further details — not scored
Size15 MB43 MB
Age rating4+4+
DeveloperMartin Dimitrovkatapu.net

Bugs and requests

MemClean

Reported bugs

6 issues
  • 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
Show 1 more
  • App becomes sluggish when displaying ads

Requested features

10 requests
  • Automatic background app closing
  • Auto-run scheduler (hourly or customizable)
  • More aggressive deep cleaning mode
  • Display which apps are consuming RAM
  • Gaming mode optimization
Show 5 more
  • App to clean junk files and disk space
  • Paid ad-free version
  • Spanish language support
  • Enhanced cleaning intensity (3x instead of 2x)
  • Automatic mode without tab switching

Useful QR Code Reader PRO

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

MemClean

No in-app purchases

None

Useful QR Code Reader PRO

No in-app purchases

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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