# System Activity Monitors vs F4.0 LDC

The clearest difference is in-app purchases: F4.0 LDC at none against System Activity Monitors's 4. System Activity Monitors's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support 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. F4.0 LDC asks for nothing beyond the download.

System Activity Monitors ships an update every 3 months, F4.0 LDC every 4 months. The most recent releases landed on October 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | System Activity Monitors | F4.0 LDC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (778 ratings)](https://appshunter.io/ios/app/system-activity-monitors/id386118145/reviews)** | — |
| Number of ratings | **778** | — |
| Positive reviews | 76.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 35 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tekton Technologies (P) Ltd.](https://appshunter.io/developer/343534621) | [Altitude Cherbourg](https://appshunter.io/developer/512464175) |

## 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


### F4.0 LDC

[App page](https://appshunter.io/ios/app/f40-ldc/id6472884672)

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

**In-app purchases:** none


## Frequently asked questions

### Is System Activity Monitors free?

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

### Is F4.0 LDC free?

F4.0 LDC is free to download, with no in-app purchases.

### Do System Activity Monitors or F4.0 LDC have ads?

Neither System Activity Monitors nor F4.0 LDC shows ads.

### Which is updated more often, System Activity Monitors or F4.0 LDC?

System Activity Monitors ships an update every 3 months, and F4.0 LDC every 4 months. Most recently, System Activity Monitors was updated on October 29, 2026 and F4.0 LDC on October 10, 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.*