Comparison

Device Kit vs VivoKey Thermo Reader

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

Head to head
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!

About

VivoKey Thermo Reader

Read full description

VivoKey Thermo reads body temperature from the VivoKey Thermo NFC implant, a subdermal chip with a TMP112 sensor. Hold your iPhone near the implant to take a reading. The app handles the energy harvesting step, communicates with the sensor over NFC, and shows the result in Celsius or Fahrenheit. FEATURES - NFC reading - Celsius or Fahrenheit - Reading history with dates and times - Temperature graph - Calibration offset - Adjustable timing settings Neither the implant nor this app is a medical device. Readings are not a clinical measurement and should be treated as an indication only. This app does not provide medical advice. Consult a doctor before making any medical decisions. This is not an official VivoKey app.

Screenshots

Device Kit4 screens
VivoKey Thermo Reader4 screens

Verdict

The call

The clearest difference is in-app purchases: VivoKey Thermo Reader at none against Device Kit's 4. On price, ads, 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 Kit sells 4 in-app purchases, starting at $3.99 per month. VivoKey Thermo Reader asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Device Kit versus VivoKey Thermo Reader: the parameters behind the verdict, then further details
ParameterDevice KitVivoKey Thermo Reader
PriceFreeFree
Rating4.9 (89 ratings) — better—
Positive reviews77.4% of reviews—
Number of ratings89 — better—
Update frequencyEvery 10 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.6 — better
Further details — not scored
Size36 MB1 MB
Age rating4+4+
DeveloperShuyang Fan Ziyang Software Development Studio (Individually Owned Business)PETR ZIEGNER

In-app purchases

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
None

VivoKey Thermo Reader

No in-app purchases

Questions

Is Device Kit free?
Device Kit is free to download, with in-app purchases available.
Is VivoKey Thermo Reader free?
VivoKey Thermo Reader is free to download, with no in-app purchases.
Do Device Kit or VivoKey Thermo Reader have ads?
Neither Device Kit nor VivoKey Thermo Reader shows ads.

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