# Device System Services vs OONI Probe

The clearest difference is in-app purchases: OONI Probe at none against Device System Services's 1. OONI Probe also leads on ads (none vs shown). Device System Services's advantage is ratings volume (394 vs 88). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.5 for Device System Services against 4.5 for OONI Probe. Both are backed by a comparable volume of ratings — 394 and 88 respectively. Written reviews are what separate them: 52% of Device System Services's written reviews are positive against 58% of OONI Probe's.

Device System Services ships an update every 4 months, OONI Probe every 2 months. The most recent releases landed on September 19, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Device System Services | OONI Probe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (394 ratings)](https://appshunter.io/ios/app/device-system-services-tools/id1126227676/reviews) | [4.5 (88 ratings)](https://appshunter.io/ios/app/ooni-probe/id1199566366/reviews) |
| Number of ratings | **394** | 88 |
| Positive reviews | 51.6% of reviews | **58.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 139 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) | [The Tor Project](https://appshunter.io/developer/1199566365) |

## 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


### OONI Probe

[App page](https://appshunter.io/ios/app/ooni-probe/id1199566366)

This app helps you detect internet censorship and surveillance systems by examining website and app blocking. It also measures your network's speed and performance, providing data that can serve as evidence of interference. All collected data is published openly to promote transparency.

**Highlights:** Examine website and app blocking, Measure network speed and performance, Detect censorship and surveillance systems, Collect evidence of internet censorship, Publish open network measurement data, Free and open source software

**Features:** 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 OONI Probe free?

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

### Which has better reviews, Device System Services or OONI Probe?

Device System Services and OONI Probe are both rated 4.5 out of 5 on the App Store, from 394 and 88 ratings respectively.

### Do Device System Services or OONI Probe have ads?

Device System Services shows ads; OONI Probe does not.

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

Device System Services ships an update every 4 months, and OONI Probe every 2 months. Most recently, Device System Services was updated on September 19, 2026 and OONI Probe on September 29, 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.*