# System Activity Monitors vs QR Scanner

The clearest difference is rating: QR Scanner at 4.7 against System Activity Monitors's 4.2. QR Scanner also leads on update cadence (fortnightly vs every 3 months) and review sentiment (89% vs 76%). System Activity Monitors's advantage is ratings volume (779 vs 130). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. System Activity Monitors sells 4 in-app purchases, starting at $3.99 per 7 days and QR Scanner sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

QR Scanner holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: System Activity Monitors has 779 ratings behind it against 130, so its average is the more settled of the two. Written reviews point the same way: 76% of System Activity Monitors's written reviews are positive against 89% of QR Scanner's.

System Activity Monitors ships an update every 3 months, QR Scanner fortnightly. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | System Activity Monitors | QR Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (779 ratings)](https://appshunter.io/ios/app/system-activity-monitors/id386118145/reviews) | **[4.7 (130 ratings)](https://appshunter.io/ios/app/qr-scanner-scan-store-create/id6476440474/reviews)** |
| Number of ratings | **779** | 130 |
| Positive reviews | 76.0% of reviews | **89.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 28 MB | 13 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tekton Technologies (P) Ltd.](https://appshunter.io/developer/343534621) | [Thumbmagic Labs LLP](https://appshunter.io/developer/1724911593) |

## What reviewers say

### System Activity Monitors

[App page](https://appshunter.io/ios/app/system-activity-monitors/id386118145)

Monitor your device's health with this comprehensive tool. Track memory, battery performance, storage, and network details. Get detailed camera information and helpful battery-saving tips to optimize your iPhone.

**Highlights:** Memory usage tracking, Battery performance monitoring, Device IP and hardware address, Battery saving tips, Used and free space indicator, Detailed camera information, System and hardware specs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sysmon Pro | $3.99 | per 7 days |
| Sysmon Pro | $6.99 | per month |
| Sysmon Pro | $29.99 | per year |
| Real Time Graphs | $2.99 | one-time |

**What reviewers like**

- 💯 Excellent app
- 🎆 Great app
- 🔒 Respects privacy
- 🔋 Helpful battery tips
- 👍 Simple and straightforward

**What reviewers complain about**

- 🐛 Buggy updates
- 💰 Subscription-based model
- 🔒 Privacy concerns due to required login
- 🔍 Limited functionality for free version
- 🔍 Inaccurate device information

**Reported bugs**

- Crashes on certain devices
- Login/registration issues
- Incorrect memory/CPU usage reporting

**Requested features**

- Ability to close/manage running apps
- More detailed app-level usage breakdown
- Dark mode option
- Widgets for quick access
- Ability to reclaim memory/free up storage


### QR Scanner

[App page](https://appshunter.io/ios/app/qr-scanner-scan-store-create/id6476440474)

Easily scan and generate custom QR codes for various purposes. This app allows you to import codes from images, manage your scan history, and securely create non-expiring codes. Enjoy an ad-free experience with Pro plans.

**Highlights:** Scan unlimited QR codes, Generate custom QR codes, Import QR codes from gallery, Track scan history, Face ID authentication, Copy, share, and download codes

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| qr_scanner_weekly | $0.99 | per 7 days |
| qr_scanner_yearly | $9.99 | per year |
| QR Scanner Unlimited | $24.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 👍 Simple and straightforward
- 👍 Useful for creating QR codes
- 👍 History feature is helpful
- 👍 Works perfectly

**What reviewers complain about**

- 🤔 App automatically prompts for review after onboarding
- 🤔 Snap photo option sometimes doesn't work as expected

**Reported bugs**

- App automatically takes users to the App Store for review immediately after onboarding
- Sometimes the snap photo option doesn't work as expected

**Requested features**

- Ability to add placeholders in one QR code (e.g., multiple links in a contact QR code)
- Link QR code functionality to a photo


## Frequently asked questions

### Is System Activity Monitors free?

System Activity Monitors is free to download, with in-app purchases available.

### Is QR Scanner free?

QR Scanner is free to download, with in-app purchases available.

### Which has better reviews, System Activity Monitors or QR Scanner?

QR Scanner is rated higher. System Activity Monitors averages 4.2 out of 5 from 779 ratings, while QR Scanner averages 4.7 from 130 ratings.

### Do System Activity Monitors or QR Scanner have ads?

Neither System Activity Monitors nor QR Scanner shows ads.

### Which is updated more often, System Activity Monitors or QR Scanner?

System Activity Monitors ships an update every 3 months, and QR Scanner fortnightly. Most recently, System Activity Monitors was updated on October 22, 2026 and QR Scanner on October 20, 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.*