Device Kit vs OpenHTML
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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!
OpenHTML
View HTML, Markdown, ZIP web projects, and source files privately on your device. Inspect and export rendered pages offline, diagnose rendering issues, and view code files securely. Designed for developers, students, and anyone needing to inspect web content safely.
- View HTML, Markdown, and source files
- Import ZIP archives and web projects
- Offline rendering with network access blocked by default
- Diagnose rendering and resource issues
- Export pages to PDF or long images
- Private by default, no accounts or analytics
Read full descriptionHide full description
OpenHTML is a private, on-device viewer for HTML, Markdown, ZIP web projects and source files on iPhone and iPad. Open files from Files, Mail, chat apps, AI tools or Safari. Preview pages offline, inspect what went wrong when a file does not render, and export finished pages when you need a clean copy. What you can do: - Open .html, .htm, .xhtml and Markdown files - Import ZIP archives and multi-file web projects - Render LaTeX math in Markdown offline, with no scripts - Preview local pages with network access off by default - Diagnose missing files, blocked resources and JavaScript issues - View JSON, XML and source files with a code-friendly reader - Export full pages to PDF or long images with OpenHTML Pro - Keep selected files in your OpenHTML folder in iCloud Drive and open them on your other devices with OpenHTML Pro Private by default: OpenHTML has no accounts, no analytics and no ads. Files are copied into the app's private storage and stay on your device unless you add them to your own OpenHTML folder in iCloud Drive. Remote resources stay blocked unless you choose to allow them for a trusted document. OpenHTML is designed for developers, students, researchers, writers and anyone who receives HTML reports, AI-generated pages, saved webpages or packaged web projects and wants to inspect them safely on iOS.
Screenshots
Verdict
The clearest difference is ratings volume: Device Kit at 87 against OpenHTML's 4. OpenHTML's advantage is update cadence (every 5 days vs every 11 days). On price, rating, review sentiment and ads 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
Both are free to download. Device Kit sells 4 in-app purchases, starting at $3.99 per month and OpenHTML sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for Device Kit against 5.0 for OpenHTML. That said, the two scores are not equally well evidenced: Device Kit has 87 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 79% of Device Kit's written reviews are positive against 71% of OpenHTML's.
Device Kit ships an update every 11 days, OpenHTML every 5 days. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.
| Parameter | Device Kit | OpenHTML |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (87 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 78.8% of reviews — better | 71.4% of reviews |
| Number of ratings | 87 — better | 4 |
| Update frequency | Every 11 days | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 36 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Shuyang Fan Ziyang Software Development Studio (Individually Owned Business) | 吉帅 仇 |
Customer experience
Device Kit
OpenHTML
In-app purchases
Device Kit
- Monthly subscription$3.991 Month
- Yearly subscription$7.991 Year
- Lifetime Membership$12.99
- Lifetime Membership$14.99
OpenHTML
- OpenHTML Pro$2.99









