# SYS Activity Manager vs Device System Services

The clearest difference is rating: Device System Services at 4.5 against SYS Activity Manager's 2.6. Device System Services also leads on review sentiment (52% vs 42%) and ratings volume (394 vs 89). SYS Activity Manager's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Device System Services sells 1 one-off in-app purchase. SYS Activity Manager asks for nothing beyond the download.

Device System Services holds the better App Store score, 4.5 against 2.6. Both are backed by a comparable volume of ratings — 89 and 394 respectively. Written reviews point the same way: 42% of SYS Activity Manager's written reviews are positive against 52% of Device System Services's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | SYS Activity Manager | Device System Services |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (89 ratings)](https://appshunter.io/ios/app/sys-activity-manager/id447374159/reviews) | **[4.5 (394 ratings)](https://appshunter.io/ios/app/device-system-services-tools/id1126227676/reviews)** |
| Number of ratings | 89 | **394** |
| Positive reviews | 42.1% of reviews | **51.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 9 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sohel Mazumder](https://appshunter.io/developer/1501146911) | [Albert Parti](https://appshunter.io/developer/534966701) |

## What reviewers say

### SYS Activity Manager

[App page](https://appshunter.io/ios/app/sys-activity-manager/id447374159)

Monitor your device's background processes, battery life, and network activity. This app provides insights into memory usage, disk space, and connection statuses, helping you diagnose network issues and optimize performance. It's designed for both expert and non-expert users.

**Highlights:** Monitor background processes and apps, Track device battery life and charging status, Analyze network connection and speed, Summarize disk usage, Visualize memory allocation, Diagnose network problems

**Features:** macOS Compatibility

**In-app purchases:** none


### Device System Services

[App page](https://appshunter.io/ios/app/device-system-services-tools/id1126227676)

Monitor your device's hardware, network, memory, and storage with detailed insights and performance tracking. Includes diagnostic tools for network analysis and storage management. Offers widgets for real-time system information.

**Highlights:** Hardware specifications, Network status and diagnostics, Memory usage monitoring, Ping, LAN Scan, Port Scan tools, Storage management, System information widgets

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads System Service | $1.99 | one-time |

**What reviewers like**

- 👍 Clean and easy-to-use interface
- 🚀 Fast and responsive performance
- 📊 Comprehensive system information display
- 🌐 Useful network information details
- ⏱️ Shows device uptime information

**What reviewers complain about**

- 📺 Excessive full-screen video advertisements
- 🔊 Intrusive ads with sound that startle users
- ⚠️ Misleading security/storage warning popups
- 🎮 Irrelevant ads (e.g., game ads on iOS)
- 💰 Ads present even in paid version

**Reported bugs**

- App crashes on startup/launch
- Crashes when network module acquires external IP
- Requires airplane mode or disabled connectivity to function
- Incorrect device specifications (resolution, model variants)
- Static pie charts instead of dynamic system statistics

**Requested features**

- Option to delete accidentally copied items
- System reset functionality to restore original settings
- Camera information display
- External USB disk space usage tracking
- Memory cleaning/optimization features


## Frequently asked questions

### Is SYS Activity Manager free?

SYS Activity Manager is free to download, with no in-app purchases.

### Is Device System Services free?

Device System Services is free to download, with in-app purchases available.

### Which has better reviews, SYS Activity Manager or Device System Services?

Device System Services is rated higher. SYS Activity Manager averages 2.6 out of 5 from 89 ratings, while Device System Services averages 4.5 from 394 ratings.

### Do SYS Activity Manager or Device System Services have ads?

Device System Services shows ads; SYS Activity Manager does not.

### Which is updated more often, SYS Activity Manager or Device System Services?

SYS Activity Manager ships an update every 4 months, and Device System Services every 4 months. Most recently, SYS Activity Manager was updated on October 9, 2026 and Device System Services on October 11, 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.*