Comparison

T vs Device System Services

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

T

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
Read full description

IP Relay, provided by T-Mobile for iOS devices, is a no cost internet-based telecommunications Mobile app available for people who are Deaf, Hard of Hearing, DeafBlind, or who have a Speech Disability who can make and receive relay calls and communicate using text on iOS 9 or higher, including iPad devices. IP Relay app is also available on wireless networks. Connect with a qualified relay operator via IP Relay. Features include integrated contact list, call history, and access to live customer care. Available only in USA and US territories. International calls will either be blocked or terminated. Registration is required to use this app. If no data plan service selected, casual data charges may apply. Learn more at t-mobile.com/IPRelay. Although IP Relay can be used for emergency calling, such emergency calling may not function the same as traditional 911/E911 services. By using the IP Relay app for emergency calling you agree that T-Mobile is not responsible for any damages resulting from errors, defects, malfunctions, interruptions, or failures in accessing or attempting to access emergency services through IP Relay whether caused by the negligence of T-Mobile or otherwise.

About

Device System Services

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
Read full description

Device System Service – System Information & Performance Monitoring Device System Service is a professional iOS application that provides detailed insights into your device’s hardware, network, memory, and storage. The app helps you monitor system performance, optimize resource usage, and ensure smooth operation. Key Features Hardware Information • Detailed specifications of your device’s model, processor, and GPU • Battery level and status monitoring • Biometric authentication support (Face ID, Touch ID) • Display size, brightness, and other screen-related details Network Status • IP address, Wi-Fi, and mobile network information • Internet connection check and speed data • Ping hosts or IP addresses to verify connectivity and response time • Local network insights and diagnostics Memory Usage • Detailed breakdown of memory usage (used, active, inactive, free memory) • Real-time memory monitoring with interactive charts • Performance tracking and optimization suggestions Tools The new Tools tab provides powerful built-in diagnostic utilities for advanced network analysis. • Ping Verify connectivity to any host or IP address and check network responsiveness in real time. Ideal for troubleshooting reachability and latency issues. • LAN Scan Discover active devices connected to your local network. Quickly identify IP addresses and detect available hosts within your subnet. • Port Scan Scan open TCP ports on a target device to analyze running services and network exposure. Useful for diagnostics, testing, and infrastructure validation. Storage Management • Total storage and available space display • Breakdown of space occupied by files and apps • Visual representation of disk usage with modern UI elements Settings & Privacy • Remove Ads – One-time purchase for a completely ad-free experience • Manage Consent – GDPR/CCPA compliance options • Ad Personalization – Customize ad preferences based on privacy policies Modern & User-Friendly Experience • Dark Mode support for a comfortable viewing experience • Interactive visual elements, graphs, and bars for easy interpretation • Optimized for both iPhone and iPad System Service Widgets – Overview The System Service app is designed for iOS system monitoring and now features three useful widgets that display key system information in real-time. Available Widgets: Device Information Widget Displayed Data: • Device name • Battery level • iOS version • Local (LAN) and external (WAN) IP addresses Usage: This widget provides a quick overview of your device, making it especially useful for developers, network administrators, and power users. Disk Usage Widget Displayed Data: • Disk usage percentage (circular progress bar) • Used storage amount (GB) • Total storage capacity (GB) Usage: This widget allows you to instantly check how much storage is available on your device. It’s particularly useful when managing large files or installing new applications. Memory Usage Widget Displayed Data: • Memory usage percentage (circular progress bar) • Used memory amount (GB) • Total memory capacity (GB) Usage: A great tool for monitoring background app memory usage, helping optimize device performance. How to Add the Widget? 1. Long-press the home screen. 2. Tap the ”+” icon in the top-left corner. 3. Scroll down to the System Service widgets. 4. Select your preferred widget size. 5. Tap “Add Widget.” Why Use It? • Provides quick system data access • Helps optimize storage and memory usage • Easily accessible—no need to open an extra app Download and try it now!

Screenshots

T4 screens
Device System Services4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
T versus Device System Services: the parameters behind the verdict, then further details
ParameterTDevice System Services
PriceFreeFree
Rating3.1 (87 ratings)4.5 (394 ratings) — better
Positive reviews16.4% of reviews51.6% of reviews — better
Number of ratings87394 — better
Update frequencyEvery 3 months — betterEvery 4 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS16.616.6
Further details — not scored
Size15 MB9 MB
Age rating4+4+
DeveloperT-MobileAlbert Parti

Customer experience

T

All ratings81 ratings
Positive45.7%
Neutral11.1%
Negative43.2%
Written reviews55 reviews
Positive16.4%
Neutral12.7%
Negative70.9%

Device System Services

All ratings394 ratings
Positive86.3%
Neutral5.3%
Negative8.4%
Written reviews64 reviews
Positive51.6%
Neutral1.6%
Negative46.9%

User reviews

T

From 87 App Store ratings

What we love

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

Room to improve

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

Device System Services

From 394 App Store ratings

What we love

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

Room to improve

  • 📺 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

Bugs and requests

T

Reported bugs

50 issues
  • App still has LOT of bugs
  • Calls get dropped
  • Line is busy error
  • Hackers fake number calls
  • App hasn't been updated
Show 45 more
  • Doesn't work at all now
  • Cut out during call
  • Tried to recall but didn't work
  • Phone number in use error
  • Call connects then drops
  • CAs typing too many 'xxxx'
  • Transcribes caller's words to email
  • Password is wrong (works elsewhere)
  • Cannot verify identity
  • New version confusing
  • Cannot use microphone on keyboard to dictate
  • Cannot register, couldn't verify details
  • App does not connect to relay
  • Microphone doesn't work for voice to text
  • App doesn't work
  • Doesn't seem to work when trying to answer call
  • Does not list incoming call
  • Opening from notification screen, number not listed
  • Buggy, doesn't cooperate with system accessibility settings
  • Scrolling is buggy
  • Incoming text bounces below window
  • Incoming call window doesn't expand
  • Incoming calls don't always answer
  • System often cuts off users
  • Performance gets worse
  • Takes several minutes for messages to get through
  • Never able to complete important calls
  • Whenever I get a call, accept call does nothing
  • No vibration or sound notification for incoming calls
  • App requires upgrade but upgrade doesn't fix error
  • Unable to type anything to answer call
  • Can't see who called
  • Cannot answer calls
  • Number flashes briefly
  • Cannot forward number
  • Forwarding isn't supposed to work
  • App crashes when opening
  • Keyboard covers text box
  • Login doesn't work
  • Login not valid
  • Username creation fails
  • Nobody can hear me
  • Login/password doesn't work on app
  • Verification review takes too long
  • Favorites screen doesn't work

Requested features

10 requests
  • 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
Show 5 more
  • Sound alerts for incoming calls
  • Way to read messages left by caller
  • Voicemail for missed calls
  • Copy and paste phone numbers into dial screen
  • Alphabetized phone book

Device System Services

Reported bugs

9 issues
  • 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
Show 4 more
  • App force-closes when switching between tabs
  • Unresponsive UI elements during ad display
  • App disappears or stops functioning after device updates
  • Suspicious clipboard activity on launch

Requested features

6 requests
  • 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
Show 1 more
  • Dark mode support

In-app purchases

None

T

No in-app purchases

1 purchases

Device System Services

One-time1
  • Remove ads System Service$1.99

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.

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