# Device System Services vs iDiagnosis

The clearest difference is rating: Device System Services at 4.5 against iDiagnosis's 3.4. Device System Services also leads on review sentiment (52% vs 25%) and ratings volume (394 vs 18). iDiagnosis's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

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

Device System Services holds the better App Store score, 4.5 against 3.4. That said, the two scores are not equally well evidenced: Device System Services has 394 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 52% of Device System Services's written reviews are positive against 25% of iDiagnosis's.

Device System Services ships an update every 4 months, iDiagnosis every 5 months. The most recent releases landed on September 19, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Device System Services | iDiagnosis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (394 ratings)](https://appshunter.io/ios/app/device-system-services-tools/id1126227676/reviews)** | [3.4 (18 ratings)](https://appshunter.io/ios/app/idiagnosis/id1534880599/reviews) |
| Number of ratings | **394** | 18 |
| Positive reviews | **51.6% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 13 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Albert Parti](https://appshunter.io/developer/534966701) | [V Group Inc](https://appshunter.io/developer/916210832) |

## 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


### iDiagnosis

[App page](https://appshunter.io/ios/app/idiagnosis/id1534880599)

Diagnose hardware components and sensors on your iPhone or iPad. Get detailed reports on tests, including device configuration and IMEI, to verify phone authenticity and functionality. Ideal for checking second-hand devices or ensuring your current phone works correctly.

**Highlights:** Diagnose mobile components and sensors, Detailed test reports, Display feature and configuration details, Check device IMEI, Test screen, sound, motion, connectivity, sensors, hardware, and camera

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

**In-app purchases:** none


## Frequently asked questions

### Is Device System Services free?

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

### Is iDiagnosis free?

iDiagnosis is free to download, with no in-app purchases.

### Which has better reviews, Device System Services or iDiagnosis?

Device System Services is rated higher. Device System Services averages 4.5 out of 5 from 394 ratings, while iDiagnosis averages 3.4 from 18 ratings.

### Do Device System Services or iDiagnosis have ads?

Device System Services shows ads; iDiagnosis does not.

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

Device System Services ships an update every 4 months, and iDiagnosis every 5 months. Most recently, Device System Services was updated on September 19, 2026 and iDiagnosis on September 4, 2026.

---

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