Comparison

Power Reader 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

Power Reader

This app allows you to view and manage a wide variety of document and eBook formats on your iPhone and iPad. It offers features like bookmarking, customizable reading settings, and cloud storage integration for seamless file access.

Highlights
  • View DOC, EXCEL, PDF, PPT, RTF, HTML, images, videos, and mp3
  • Read EPUB and TXT eBooks
  • Bookmark management for eBooks
  • Customizable reading settings (font, brightness, themes)
  • File Manager with import/export and cloud integration
  • Download eBooks from websites
Features
Read full description

Power Reader is a powerful tool to view documents and eBooks on iPad/iPhone. It supports: -Open and view many document types, including: DOC, EXCEL, PDF, PPT, RTF, HTML, images, videos and mp3 files. -Read EPUB and TXT eBooks in Book Reader. -Add and manage Bookmarks on eBooks. -Enable different viewing settings on eBooks, including: font, brightness, themes, day/night modes. - Auto play eBooks with speed setting. -Add and manage documents in your favorite file list. -Open documents from your recent file list. -Download eBooks from websites. - Download from/upload to Dropbox, Box and GoogleDrive. (Upgrade Required) Power Reader also has a File Manager, which supports the following features: -Import files from your Email or another App through “Open In”. -Manage Files including: rename, delete, move, create folder and sort. -Search file names. -Email and print documents. -Open a document using another App. With its simple interfaces, Power Reader provides the easiest way to read documents and eBooks on iPhone and iPad. If you have any questions, please visit: http://www.comcsoft.com/Portfolio/our_apps/PowerReader/PowerReader_overview.php.

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

Power Reader4 screens
Device System Services4 screens

Verdict

The call

The clearest difference is rating: Device System Services at 4.5 against Power Reader's 3.8. Device System Services also leads on ratings volume (394 vs 4). Power Reader's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, review sentiment, update cadence and device support 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. Power Reader asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Device System Services holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: Device System Services has 394 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 55% of Power Reader's written reviews are positive against 52% of Device System Services's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Power Reader ships an update every 2 months, Device System Services every 4 months. Both last shipped on October 6, 2026.

Scorecard6 real differences · 4 level
Power Reader versus Device System Services: the parameters behind the verdict, then further details
ParameterPower ReaderDevice System Services
PriceFreeFree
Rating3.8 (4 ratings)4.5 (394 ratings) — better
Positive reviews55.0% of reviews — better51.6% of reviews
Number of ratings4394 — better
Update frequencyEvery 2 months — betterEvery 4 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better16.6
Further details — not scored
Size73 MB9 MB
Age rating17+4+
DeveloperComcSoft CorporationAlbert Parti

Customer experience

Power Reader

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews40 reviews
Positive55.0%
Neutral12.5%
Negative32.5%

Device System Services

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

Bugs and requests

Power Reader

Not enough reviews yet to summarise bugs or requests.

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

Power Reader

No in-app purchases

1 purchases

Device System Services

One-time1
  • Remove ads System Service$1.99

Questions

Is Power Reader free?
Power Reader 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, Power Reader or Device System Services?
Device System Services is rated higher. Power Reader averages 3.8 out of 5 from 4 ratings, while Device System Services averages 4.5 from 394 ratings.
Do Power Reader or Device System Services have ads?
Device System Services shows ads; Power Reader does not.
Which is updated more often, Power Reader or Device System Services?
Power Reader ships an update every 2 months, and Device System Services every 4 months. Most recently, Power Reader was updated on October 6, 2026 and Device System Services on October 6, 2026.

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