Comparison

QR Scanner vs Charging Engine

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

Head to head
About

QR Scanner

Easily scan and read QR codes and barcodes with this safe and professional tool. It automatically detects and decodes information without needing an internet connection. Protects user privacy by only requesting necessary camera permissions.

Highlights
  • Scan all QR codes and barcodes
  • Instant scanning and decoding
  • No internet connection required
  • Scan history
  • Minimal permissions required
  • User privacy protected
Features
Read full description

Safe, professional and easy to use QR code scanner, QR code reader and barcode scanner. Download now! To scan a QR code or barcode, you just open the app and point your camera at the code you want to scan, and the app will automatically detect, scan, read and decode it. QR Code Scanner/QR Code Reader Features: • Scan all barcodes and QR codes, including different QR code formats • Instant QR code scanning and decoding • No internet connection required • Scan history • Only requires camera permissions to work • Does not ask for any unnecessary permissions • User privacy is fully protected Automatic - Renewal Yearly (3-day free trial), Monthly (3-day free trial) and Weekly subscriptions remove ads. Weekly Subscription $3.99 Monthly Subscription $8.99 Annual Subscription $19.99 Automatic renewal service: https://qrios-c453e.web.app/auto_renewal_service.html Terms of Use: https://qrios-c453e.web.app/qr_terms.html

About

Charging Engine

Enhance your phone's charging experience with dynamic, futuristic animations and live wallpapers. Visualize battery performance and enjoy regular content updates to keep your device looking fresh and engaging.

Highlights
  • Futuristic charging animations
  • High-definition dynamic screensavers
  • Dozens of 3D charging wallpapers
  • Live wallpaper collections
  • Battery performance monitor
  • Regular content updates
Features
Read full description

Charging Engine provides a variety of cool and futuristic charging animations. When your phone is charging, just plug in the power supply, and an exclusive and exquisite high-definition dynamic screensaver will be displayed instantly. Make your phone full of futuristic, eye-catching and fun! We provide dozens of 3D charging wallpapers, dynamic and cool wallpapers, the picture is smooth and delicate, and the frame will never drop. Follow our tutorial to guide you step by step. When you connect the device to the charger, the animation will appear immediately for you to watch. Add color to your life with a charging lock! With a top-notch wallpaper app, dazzle with a wide variety of unique wallpaper collections that can help your mobile experience go beyond your imagination. main feature: - Live wallpapers: No need to waste your time on internet research for wallpaper as you can find them all on this amazing app. anytime, anywhere, including abstract, animals, space, nature, flowers, fantasy and more! - Various charging animations: The editor has carefully selected dozens of different styles of live wallpapers for you, making your phone richer and far from boring! - Battery Performance Monitor: Visualize your phone device's battery capacity by watts. Check the charging history in the app to get a clear idea of ​​the available time in different situations. - Regular updates: from high-tech visualizations to light-hearted scenarios - you'll find what you're looking for! We keep all categories fresh and exciting by adding new content. stay tuned! [advanced edition] Upgrade - weekly subscription: $3.99/ week with 3-day free trial;$3.99/week Upgrade - monthly subscription: $19.99/ month with 3-day free trial;$19.99/month Upgrade - annual subscription: $69.99/ year,with 3-day free trial; $69.99/ year Payment will be collected from your iTunes account after you confirm the purchase. The system will automatically renew the subscription for you, unless the automatic renewal setting is turned off 24 hours before the end of the current subscription period. Your account will be charged the next renewal fee within 24 hours before the end of this subscription period and the renewal fee will be confirmed. Subscriptions will be controlled by you, and automatic renewal can be turned off in the user's account Settings after purchase. When you purchase a subscription to this version, you will lose any unused portion of the free trial period. Terms of service: https://sites.google.com/view/terms-of-service-of-charging-w/%E9%A6%96%E9%A1%B5 Privacy agreement: https://sites.google.com/view/privacypolicyofcharging/%E9%A6%96%E9%A1%B5 If you have any other questions, please contact us through the following email zhiyinzhihui22@163.com

Screenshots

QR Scanner4 screens
Charging Engine4 screens

Verdict

The call

The clearest difference is review sentiment: Charging Engine at 52% against QR Scanner's 0%. Charging Engine also leads on rating (4.8 vs 3.1) and ads (none vs shown). QR Scanner's advantage is monetization model (free with in-app purchases vs subscription) and update cadence (weekly vs every 6 weeks). On price, in-app purchases, device support and iOS requirement 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

Both are free to download. QR Scanner sells 4 in-app purchases, starting at $1.99 per 7 days and Charging Engine sells 10 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Charging Engine holds the better App Store score, 4.8 against 3.1. That said, the two scores are not equally well evidenced: Charging Engine has 11K ratings behind it against 34, so its average is the more settled of the two. Written reviews point the same way: 0% of QR Scanner's written reviews are positive against 52% of Charging Engine's.

UpkeepUpdate frequency

QR Scanner ships an update weekly, Charging Engine every 6 weeks. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

Scorecard6 real differences · 4 level
QR Scanner versus Charging Engine: the parameters behind the verdict, then further details
ParameterQR ScannerCharging Engine
PriceFreeFree
Rating3.1 (34 ratings)4.8 (11K ratings) — better
Positive reviews0.0% of reviews51.6% of reviews — better
Number of ratings3411K — better
Update frequencyWeekly — betterEvery 6 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.012.0
Further details — not scored
Size50 MB112 MB
Age rating4+4+
DeveloperHUIENTZ UK LTDBluewolf Technology Limited

Customer experience

QR Scanner

All ratings34 ratings
Positive47.1%
Neutral14.7%
Negative38.2%
Written reviews8 reviews
Positive0.0%
Neutral12.5%
Negative87.5%

Charging Engine

All ratings10,572 ratings
Positive94.1%
Neutral2.0%
Negative3.9%
Written reviews225 reviews
Positive51.6%
Neutral6.7%
Negative41.8%

Bugs and requests

QR Scanner

Not enough reviews yet to summarise bugs or requests.

Charging Engine

Reported bugs

3 issues
  • Wallpapers don't work as advertised
  • App only functions when kept open during charging
  • Subscription cannot be easily canceled

Requested features

4 requests
  • Add search bar to find desired wallpapers
  • Allow users to upload their own photos/videos
  • Provide option to mute sound effects
  • Make app fully free without subscription

In-app purchases

4 purchases

QR Scanner

Subscriptions3
  • One Week Premium - Basic$1.997 Days
  • One Month Premium - Standard3 Days trial$6.991 Month
  • One Year Premium - Popular7 Days trial$14.991 Year
One-time1
  • Lifetime Premium - Best Value$19.99
10 purchases

Charging Engine

Subscriptions9
  • ChargingEngine Subscription3 Days trial$3.997 Days
  • ChargingEngine Subscription$3.997 Days
  • Weekly subscription7 Days trial$4.997 Days
Show 6 more
  • ChargingEngine Subscription3 Days trial$19.991 Month
  • ChargingEngine Subscription$19.991 Month
  • ChargingEngine Subscription3 Days trial$23.991 Month
  • ChargingEngine Subscription$23.991 Month
  • ChargingEngine Subscription3 Days trial$69.991 Year
  • ChargingEngine Subscription$69.991 Year
One-time1
  • ChargingEngine lifetime$69.99

Questions

Is QR Scanner free?
QR Scanner is free to download, with in-app purchases available.
Is Charging Engine free?
Charging Engine is free to download, with in-app purchases available.
Which has better reviews, QR Scanner or Charging Engine?
Charging Engine is rated higher. QR Scanner averages 3.1 out of 5 from 34 ratings, while Charging Engine averages 4.8 from 11K ratings.
Do QR Scanner or Charging Engine have ads?
QR Scanner shows ads; Charging Engine does not.
Which is updated more often, QR Scanner or Charging Engine?
QR Scanner ships an update weekly, and Charging Engine every 6 weeks. Most recently, QR Scanner was updated on November 3, 2026 and Charging Engine on November 10, 2026.

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