# Amperes 4 vs QR Code

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 (#190 vs unranked). On review sentiment, ads and device support there is nothing between them.

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.

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.

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.

## The numbers

| Metric | Amperes 4 | QR Code |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.4 (652 ratings)](https://appshunter.io/ios/app/amperes-4-battery-charge-info/id1245475416/reviews) | **[4.8 (113 ratings)](https://appshunter.io/ios/app/qr-code-generator-and-maker/id6450634501/reviews)** |
| Number of ratings | **652** | 113 |
| Positive reviews | 46.7% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#190** | — |
| Size | 36 MB | 145 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CrioSoft LLC](https://appshunter.io/developer/1245475415) | [Muhammad Abdullah](https://appshunter.io/developer/1867791025) |

## What reviewers say

### Amperes 4

[App page](https://appshunter.io/ios/app/amperes-4-battery-charge-info/id1245475416)

**Currently charting:** #190 Top Paid · Utilities (US App Store)

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:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Uniquely useful
- 🚀 Only way to test charging
- 👍 Probando
- 👍 Used for YEARS
- 👍 Works well despite limited / restricted OS functions

**What reviewers complain about**

- 🐛 Does not work on iPhone as advertised
- 🐛 Doesn't give rate of charge
- 🐛 Useless on newer iOS
- 🐛 Slow and useless
- 🐛 Fraudulent App

**Reported bugs**

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

**Requested features**

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


### QR Code

[App page](https://appshunter.io/ios/app/qr-code-generator-and-maker/id6450634501)

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:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scan & Share - Weekly | $4.99 | per 7 days |
| Scan & Share - Monthly | $6.99 | per month |
| Scan & Share | $19.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*