# Device System Services vs Mobile Master

The clearest difference is update cadence: Mobile Master at every 6 days against Device System Services's every 4 months. Mobile Master also leads on review sentiment (72% vs 52%) and ratings volume (1.2K vs 394). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Device System Services sells 1 one-off in-app purchase and Mobile Master sells 3 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for Device System Services against 4.5 for Mobile Master. Both are backed by a comparable volume of ratings — 394 and 1.2K respectively. Written reviews are what separate them: 52% of Device System Services's written reviews are positive against 72% of Mobile Master's.

Device System Services ships an update every 4 months, Mobile Master every 6 days. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Device System Services | Mobile Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (394 ratings)](https://appshunter.io/ios/app/device-system-services-tools/id1126227676/reviews) | [4.5 (1.2K ratings)](https://appshunter.io/ios/app/mobile-master-cpu-master/id1329937809/reviews) |
| Number of ratings | 394 | **1.2K** |
| Positive reviews | 51.6% of reviews | **72.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 9 MB | 22 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Albert Parti](https://appshunter.io/developer/534966701) | [东海 刘](https://appshunter.io/developer/1329937808) |

## What reviewers say

### 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


### Mobile Master

[App page](https://appshunter.io/ios/app/mobile-master-cpu-master/id1329937809)

This free utility app provides detailed information about your device's hardware and software. It measures real CPU frequency, frequency reduction, and offers insights into your screen, battery, network, GPU, RAM, and sensors.

**Highlights:** Measure real CPU frequency, Monitor frequency reduction, View CPU, GPU, and RAM details, Check network speed and IP, Display battery design capacity, Access sensor data

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.49 | per month |
| Pro Annual | $2.99 | per year |
| Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is Device System Services free?

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

### Is Mobile Master free?

Mobile Master is free to download, with in-app purchases available.

### Which has better reviews, Device System Services or Mobile Master?

Device System Services and Mobile Master are both rated 4.5 out of 5 on the App Store, from 394 and 1.2K ratings respectively.

### Do Device System Services or Mobile Master have ads?

Both Device System Services and Mobile Master show ads.

### Which is updated more often, Device System Services or Mobile Master?

Device System Services ships an update every 4 months, and Mobile Master every 6 days. Most recently, Device System Services was updated on October 11, 2026 and Mobile Master on October 8, 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.*