Comparison

CPU vs Device Kit

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

Head to head
About

CPU

This app provides detailed insights into your device's hardware and real-time diagnostics. It also offers tools to optimize storage by compressing media and cleaning contacts, along with a comprehensive suite for testing device sensors and network functions.

Highlights
  • Comprehensive device hardware insights
  • Real-time diagnostics and sensor testing
  • Video and image compression
  • Duplicate contact cleanup
  • Junk mail and spam message filtering
  • Network diagnostics tools
Features
Read full description

CPU-X is an all-in-one device information, hardware monitoring, and system diagnostic tool for iPhone and iPad. It provides real-time insights into device performance, temperature, hardware status, and network conditions with a clean and efficient interface. All data is processed locally on your device. No data is collected or uploaded. 1. Comprehensive Device Information: Device model and system information, CPU architecture and performance details, GPU information, memory (RAM) usage, storage usage and available space, battery health and charging status, device temperature monitoring (CPU and battery temperature), network configuration and connectivity status, sensor availability and access status. 2. Real-Time System Monitoring: CPU usage monitoring, memory usage tracking, storage analysis, network speed and latency testing, system status overview. 3. Device Temperature Monitoring: CPU temperature monitoring, battery temperature monitoring, charging temperature tracking, thermal load and performance impact analysis. 4. Widgets and Quick Access: Home screen widgets, real-time device status widgets, battery CPU and storage shortcuts, quick system overview panel. 5. Display and Refresh Rate Tools: High refresh rate detection (60Hz, 120Hz, ProMotion), screen refresh rate testing, display performance analysis, picture in picture support for floating monitoring view. 6. Advanced Device Diagnostic Tools: Sensor testing including accelerometer gyroscope magnetometer barometer altimeter device motion and pedometer, connectivity testing including GPS compass Bluetooth NFC iBeacon, audio and haptics testing including microphone speaker vibration and haptic feedback, display and touch testing including brightness multi-touch and screen color test, camera testing including camera and flash test, network tools including ping traceroute DNS lookup speed test and network scanner. 7. Privacy Protection: CPU-X does not collect store or transmit any personal data or non-personal data. All information remains fully local on your device and under your control. Contact: For feedback or support contact miaozhi.ai@gmail.com

About

Device Kit

Monitor your device's hardware performance in real-time with detailed CPU, memory, and battery usage. Access a suite of practical tools including weather, network diagnostics, and sensors. Visualize historical data with customizable charts and home screen widgets.

Highlights
  • Real-time CPU, memory, and battery monitoring
  • Visual data charts for performance trends
  • Picture-in-Picture mode for continuous monitoring
  • Customizable home screen widgets
  • Pro Toolbox with system, environment, and network tools
  • Sensor data including compass and barometer
Features
Read full description

Device Kit — Your iPhone's All-in-One Health Checker, Take Full Control of Your Device in Real Time! Ever wonder how hot your phone really is? How fast is it charging? Is your CPU about to max out? Is your network being throttled? Device Kit gives you the most intuitive, real-time, and comprehensive answers. ▸▸ Core Monitoring at a Glance ◂◂ CPU Temperature — Real-time device temperature with smart estimates for battery and body temperature. 6-level thermal warning system alerts you before your phone overheats. CPU Usage — Real-time CPU utilization monitoring with user/system/idle breakdowns, plus historical trend charts to track load changes. Network Speed — Real-time speed for both Wi-Fi and cellular networks. Monitor upload/download speeds, peak speeds, and daily data usage stats. Battery Status — Charge level, charging state, low-power mode, thermal status — full battery health insights. Memory & Storage — Used/total capacity with breakdowns, storage usage percentage — say goodbye to storage anxiety. ▸▸ Dynamic Island & Floating Widgets — Desktop Monitoring ◂◂ Dynamic Island Live Monitor — No need to open the app. While your phone is locked or you're using other apps, the Dynamic Island shows real-time CPU temperature, network speed, and CPU usage with live updates. Picture-in-Picture Floating Widget — A persistent floating window on your home screen monitors network speed, temperature, and CPU. Drag it anywhere, use it while doing other tasks — true desktop-level monitoring experience. Motion Tracker on Dynamic Island — While recording motion trajectory, the Dynamic Island displays real-time distance, duration, and speed. ▸▸ Charging Power Detection ◂◂ Real-time Power Estimation — Detects charging power (W) in real time, telling you whether it's slow charging, standard charging, or fast charging. Charging Speed Rating — Slow / Standard / Fast / Ultra — clear at a glance. Charging Statistics — Duration, peak power, and total energy charged — a complete charging report. History Log — Every charging session is automatically saved for later review and comparison. ▸▸ 18 Practical Tools ◂◂ 【System Tools】 Flashlight (9 blink modes with brightness adjustment), Haptic Feedback, Multi-Touch Test, Motion Tracker 【Network Tools】 Ping, Telnet, SSH (Pro) 【Utility Tools】 QR Code Generator, Decibel Meter, Password Generator 【Sensor Tools】 Compass, GPS, Gyroscope, Magnetometer, Barometer, Altimeter, Proximity Sensor 【Display Tools】 Color & Brightness Adjustment 【Environment Tools】 Weather (Pro) ▸▸ Home Screen Widgets ◂◂ Home Screen Widgets — Uptime, Weather, CPU, Temperature, Memory, Storage, Clock, Device Info, Quick Actions. Available in Small, Medium, and Large sizes. Lock Screen Widgets — Weather, Storage, Uptime — check key info without unlocking. 【Auto-Renewable Subscription Terms】 Pro membership is an auto-renewing subscription billed monthly or yearly. Payment will be charged to your Apple ID account upon confirmation of purchase. The subscription will automatically renew within 24 hours prior to the end of the current period unless auto-renew is turned off at least 24 hours before the end of the current period. To cancel, please turn off auto-renewal in Settings > Apple ID > Subscriptions at least 24 hours before the current period ends. You can manage or cancel your subscription anytime after purchase in your account settings. Any unused portion of a free trial period (if offered) will be forfeited when you purchase a subscription. 【Privacy Policy & Terms of Service】 Privacy Policy: https://device-kit.pages.dev/private Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Download Device Kit and keep your device under your complete control!

Screenshots

CPU4 screens
Device Kit4 screens

Verdict

The call

The clearest difference is ads: Device Kit at none against CPU's shown. Device Kit also leads on review sentiment (77% vs 61%) and rating (4.9 vs 4.7). CPU's advantage is iOS requirement (15.6 vs 17.0). On price, ratings volume, update cadence and in-app purchases 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. CPU sells 1 one-off in-app purchase and Device Kit sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Device Kit holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 116 and 93 respectively. Written reviews point the same way: 61% of CPU's written reviews are positive against 77% of Device Kit's.

UpkeepUpdate frequency

CPU ships an update fortnightly, Device Kit every 10 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
CPU versus Device Kit: the parameters behind the verdict, then further details
ParameterCPUDevice Kit
PriceFreeFree
Rating4.7 (116 ratings)4.9 (93 ratings) — better
Positive reviews61.1% of reviews77.4% of reviews — better
Number of ratings116 — better93
Update frequencyFortnightlyEvery 10 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size170 MB36 MB
Age rating4+4+
DeveloperCHENGDU MIAOZHI TECHNOLOGY CO., LTD.Shuyang Fan Ziyang Software Development Studio (Individually Owned Business)

Customer experience

CPU

All ratings111 ratings
Positive92.8%
Neutral2.7%
Negative4.5%
Written reviews18 reviews
Positive61.1%
Neutral5.6%
Negative33.3%

Device Kit

All ratings88 ratings
Positive97.7%
Neutral0.0%
Negative2.3%
Written reviews53 reviews
Positive77.4%
Neutral3.8%
Negative18.9%

In-app purchases

1 purchases

CPU

One-time1
  • Lifetime Premium$5.99
4 purchases

Device Kit

Subscriptions2
  • Monthly subscription$3.991 Month
  • Yearly subscription$7.991 Year
One-time2
  • Lifetime Membership$12.99
  • Lifetime Membership$14.99

Questions

Is CPU free?
CPU is free to download, with in-app purchases available.
Is Device Kit free?
Device Kit is free to download, with in-app purchases available.
Which has better reviews, CPU or Device Kit?
Device Kit is rated higher. CPU averages 4.7 out of 5 from 116 ratings, while Device Kit averages 4.9 from 93 ratings.
Do CPU or Device Kit have ads?
CPU shows ads; Device Kit does not.
Which is updated more often, CPU or Device Kit?
CPU ships an update fortnightly, and Device Kit every 10 days. Most recently, CPU was updated on November 3, 2026 and Device Kit on October 31, 2026.

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