# T vs Device System Services

The clearest difference is rating: Device System Services at 4.5 against T's 3.1. Device System Services also leads on review sentiment (52% vs 16%) and ratings volume (394 vs 87). T'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. T asks for nothing beyond the download.

Device System Services holds the better App Store score, 4.5 against 3.1. Both are backed by a comparable volume of ratings — 87 and 394 respectively. Written reviews point the same way: 16% of T's written reviews are positive against 52% of Device System Services's.

T ships an update every 3 months, Device System Services every 4 months. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | T | Device System Services |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (87 ratings)](https://appshunter.io/ios/app/t-mobile-ip-relay/id542802329/reviews) | **[4.5 (394 ratings)](https://appshunter.io/ios/app/device-system-services-tools/id1126227676/reviews)** |
| Number of ratings | 87 | **394** |
| Positive reviews | 16.4% of reviews | **51.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 9 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [T-Mobile](https://appshunter.io/developer/525560781) | [Albert Parti](https://appshunter.io/developer/534966701) |

## What reviewers say

### T

[App page](https://appshunter.io/ios/app/t-mobile-ip-relay/id542802329)

This app enables individuals who are Deaf, Hard of Hearing, DeafBlind, or have a Speech Disability to make and receive relay calls using text over the internet. It connects users with a qualified relay operator and offers features like an integrated contact list and call history.

**Highlights:** Text-based relay calls, Integrated contact list, Call history, Access to live customer care, Available on wireless networks

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Accessible for DeafBlind
- 👍 Can save conversations
- 👍 Live operator accuracy
- 👍 App updated for easier call shifting
- 👍 Good for Spasmodic Dysphonia

**What reviewers complain about**

- 🐛 Lots of bugs
- 🐛 Calls get dropped
- 🐛 Fake number calls
- 🐛 App not updated
- 🐛 App broken, cannot make calls

**Reported bugs**

- App still has LOT of bugs
- Calls get dropped
- Line is busy error
- Hackers fake number calls
- App hasn't been updated

**Requested features**

- Ability to report spam callers
- Send words automatically as I type
- Add ability to block numbers
- Option to subscribe to spam call blocking service
- Make browser and app interfaces more similar


### 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 T free?

T 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, T or Device System Services?

Device System Services is rated higher. T averages 3.1 out of 5 from 87 ratings, while Device System Services averages 4.5 from 394 ratings.

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

Device System Services shows ads; T does not.

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

T ships an update every 3 months, and Device System Services every 4 months. Most recently, T was updated on September 21, 2026 and Device System Services on September 19, 2026.

---

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