Comparison

Amperes 4 vs QR Code

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

Head to head
About

Amperes 4

This app helps you understand your device's charging performance. It diagnoses charging issues, compares different charging methods, and monitors battery health with detailed data and alarms. Get insights into your power setup for optimal device longevity.

Highlights
  • Battery charging rates (mA and wattage)
  • Hardware comparison testing
  • Detailed charging graphs
  • Global charging speed benchmarking
  • Intelligent battery alarms
  • System vital monitoring
Features
Currently charting
Read full description

Take Control of Your Power with Amperes 4 Stop guessing why your phone is charging slowly. Amperes 4 is the ultimate diagnostic tool designed to help you test your charging setup, identify faulty hardware, and monitor your device's health with professional-grade precision. Key Features Battery Charging Rates: Get the mA and wattage data to see exactly how much juice is flowing into your battery. Hardware Comparisons: Side-by-side testing for wired vs. wireless chargers, power banks, and different cable types. Deep Data & Graphs: Visualize your charging sessions with detailed, interactive graphs that track performance over time. Global Benchmarking: Compare your charging speeds with other users online to see if your gear is performing at its peak. Intelligent Battery Alarm: Get notified the moment your battery reaches your desired level to help prolong its lifespan. System Vital Monitoring: Track thermal status, memory usage, and disk space alongside your battery metrics. Professional Testing Tools Customized Logging: Add notes about wire brands or charger models to your tests for future reference. Color-Coded Results: Intuitive UI instantly shows you if a charger is "Good," "Average," or "Bad." Exportable Data: Need the raw numbers? Export your test results for external analysis or record-keeping. Why Amperes 4? Whether you are testing a brand-new GaN charger, verifying a "fast-charging" cable, or troubleshooting a power bank, Amperes 4 gives you the transparency you need to keep your devices running efficiently. Stop wasting time with bad cables. Get the data. Get Amperes 4.

About

QR Code

Easily scan, create, and share QR codes and barcodes. This app supports various formats for instant information access and offers features for inventory management and data export. Syncs across devices for seamless organization.

Highlights
  • Comprehensive QR and barcode scanning
  • Create custom QR codes for links, WiFi, events
  • Scan and share product information
  • Inventory management and business scanner mode
  • Sync scan history across devices with iCloud
  • Export scan history as CSV
  • Quick access via Apple Watch and widgets
Features
Read full description

QRbot: The Ultimate QR Code & Barcode Scanner for iPhone and iPad Unlock a world of information and possibilities with QRbot, the free QR code scanner and barcode scanner app for iPhone and iPad! Scan QR codes, create and share your own, and manage data effortlessly. Whether you’re a professional, student, or hobbyist, QRbot is the ultimate qr code maker and barcode maker for all your needs. Scan, Create, and Share Codes Instantly With QRbot, you can scan any QR code, barcode, or product code for instant access to information from sites like Amazon and Walmart. QRbot is a qr code scanner free app that supports all major formats, including QRCode, EAN, UPC, Code 128, Data Matrix, Aztec, and more. Need to create custom QR codes? QRbot is the best qr code creator for generating codes for links, WiFi, calendar events, contacts, and more. The All-in-One QR & Barcode Solution QRbot goes beyond scanning. It’s a tool for inventory management, price scanning, and organizing scan history. Sync across devices with iCloud and export your history as a CSV to apps like Excel, Numbers, or cloud storage like Google Drive, iCloud Drive, and Dropbox. QRbot Key Features: - Comprehensive Scanning: Supports QR, EAN, UPC, Data Matrix, Aztec, and more, making it the only qr code scanner and barcode scanner you need. - Create & Share: With QRbot’s built-in qr creator and barcode maker, you can easily share WiFi, contacts, and events via custom QR codes. - Personalized Scanning: Add custom websites to personalize your experience with top shopping sites like Amazon. - Inventory & Business: Business Scanner Mode makes it easy to manage inventory and quality assurance. Export your data to spreadsheets with ease. - Instant Sync Across Devices: iCloud keeps your scan history in sync across iPhones, iPads, and Apple Watches. - Export & Organize: Export scan history as a CSV for use in Excel, Numbers, or save to cloud services like Dropbox and Google Drive. - Quick Access & Widgets: Add frequently used QR codes (like personal WiFi or VCard) to Apple Watch or widgets for fast access. Enhanced Features for Professionals and Hobbyists Whether you’re scanning barcodes, creating a QR code for WiFi, or using scan and go for easy shopping, QRbot has everything you need. Our AI scanner is built for accuracy and speed, while NFC writer and RFID reader support expand functionality for specific needs. Additional Capabilities: - Spotlight Search Integration: Find any saved code with a quick Spotlight search. - Free Barcode Reader: QRbot is also a qr barcode scanner free solution for all barcode scanning needs. - Compatibility: Works with Pixelab, Blue Beam, gloryfit, and NFC tags to handle any task. - Scan & Go: Quickly scan barcodes and product labels for prices or product information with scan barcode app free features. Why Choose QRbot? QRbot is more than just a qr scanner free scanner. It’s a complete qr code scanner for iPhone that’s perfect for both personal and professional use. Features like the product scanner, walmart barcode scanner, amazon scanner, and read pdf capabilities make it incredibly versatile. Download QRbot Now – Full Access Awaits! Unlock all features and get the most out of QRbot with a subscription. Subscription plans offer unlimited access to advanced scanning, exporting, and management tools, billed based on your chosen plan. Privacy Policy: https://pixelab.website/privacy Terms and Conditions: https://pixelab.website/terms

Screenshots

Amperes 44 screens
QR Code4 screens

Verdict

The call

The clearest difference is price: QR Code at Free against Amperes 4's $2.99. QR Code also leads on rating (4.8 vs 4.4) and update cadence (every 3 weeks vs every 2 months). Amperes 4's advantage is in-app purchases (none vs 3) and chart position (#59 vs unranked). On review sentiment, ads 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

QR Code is free to download; Amperes 4 costs $2.99 up front. QR Code sells 3 in-app purchases, starting at $4.99 per 7 days. Amperes 4 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

QR Code holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Amperes 4 has 652 ratings behind it against 113, so its average is the more settled of the two. Written reviews point the same way: 47% of Amperes 4's written reviews are positive against 50% of QR Code's.

UpkeepUpdate frequency

Amperes 4 ships an update every 2 months, QR Code every 3 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 3 level
Amperes 4 versus QR Code: the parameters behind the verdict, then further details
ParameterAmperes 4QR Code
Price$2.99Free — better
Rating4.4 (652 ratings)4.8 (113 ratings) — better
Positive reviews46.7% of reviews50.0% of reviews — better
Number of ratings652 — better113
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#59 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.014.0 — better
Further details — not scored
Size36 MB145 MB
Age rating4+4+
DeveloperCrioSoft LLCMuhammad Abdullah

Customer experience

Amperes 4

All ratings644 ratings
Positive86.3%
Neutral3.4%
Negative10.2%
Written reviews229 reviews
Positive46.7%
Neutral8.3%
Negative45.0%

QR Code

All ratings114 ratings
Positive94.7%
Neutral1.8%
Negative3.5%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

Amperes 4

Reported bugs

4 issues
  • Charging test results in total nonsense
  • Doesn't work on iPad in landscape mode
  • Login screen freezes
  • Incompatible with older devices

Requested features

4 requests
  • Dark mode option
  • Advanced analytics dashboard
  • Ability to save charger/wire names
  • Ability to monitor charging in the background

QR Code

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Amperes 4

No in-app purchases

3 purchases

QR Code

Subscriptions3
  • Scan & Share - Weekly$4.997 Days
  • Scan & Share - Monthly$6.991 Month
  • Scan & Share3 Days trial$19.991 Year

Questions

Is Amperes 4 free?
Amperes 4 costs $2.99, with no in-app purchases.
Is QR Code free?
QR Code is free to download, with in-app purchases available.
Which has better reviews, Amperes 4 or QR Code?
QR Code is rated higher. Amperes 4 averages 4.4 out of 5 from 652 ratings, while QR Code averages 4.8 from 113 ratings.
Do Amperes 4 or QR Code have ads?
Neither Amperes 4 nor QR Code shows ads.
Which is updated more often, Amperes 4 or QR Code?
Amperes 4 ships an update every 2 months, and QR Code every 3 weeks. Most recently, Amperes 4 was updated on November 1, 2026 and QR Code on October 30, 2026.

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