CPU vs RynDevice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPU
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Get a clearer view of your iPhone with CPU-G, a streamlined system information and performance monitor designed for quick, easy checks. LIVE PERFORMANCE Track current CPU usage with automatic updates. See active cores, architecture, estimated processor details, GPU information, and Metal support in one convenient dashboard. MEMORY AND STORAGE Review memory usage, available memory, total capacity, storage usage, free space, and file system information. Simple progress indicators make it easy to understand your device status at a glance. BATTERY AND THERMAL STATUS Check battery level, charging status, Low Power Mode, estimated capacity, and the current thermal state of your device. DETAILED DEVICE INFORMATION Explore useful specifications for your display, cameras, network connections, controllers, hardware model, operating system, connector, and uptime. CPU-G includes: • Live CPU usage • Processor and GPU information • Memory and storage statistics • Battery and thermal status • Display and camera specifications • Network activity and wireless details • Connected controller information • Device model, OS, and uptime CPU-G presents technical information in a clean, readable interface, making it useful for troubleshooting, device checks, performance awareness, and anyone curious about the hardware inside their iPhone. Important: Some hardware specifications cannot be read directly through public iOS interfaces. Values labeled “estimated” are inferred from the detected device model and may vary by model, region, configuration, or operating system. CPU-G does not perform benchmark testing and does not claim to measure exact hardware clock speeds or battery health.
RynDevice
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RynDevice shows you everything your iPhone can tell you about itself — clearly organized, honestly labeled, and readable offline. ■ 19 categories, every value in one place Device, System/OS, CPU, Graphics, Memory, Storage, Battery, Display, Camera, Network, Sensors, Location, Connectivity, Sound & Media, Security, Hardware features, Thermal — plus test tools and settings. ■ Live sensor graphs View readings from the accelerometer, gyroscope and other sensors in real time, with per-axis charts and full technical details. ■ 9 hardware tests Display, touch, speaker, microphone, camera, flashlight, vibration, GPS and sensors — pass/fail per test, with a shareable report. Handy when checking a used phone before buying or selling. ■ See where every value comes from Turn on “Value source” to see the exact iOS API behind each value (utsname.machine, ProcessInfo, …). Built for developers and QA. ■ Honest about limits When iOS doesn’t expose a value (serial number, IMEI, …), RynDevice says “Restricted” instead of guessing — never a made-up number. ■ Permissions only when needed Permissions are requested only on the screens that actually need them, with a clear reason — and you can decline and keep using everything else. ■ Works offline All device info and tests work without a network. ■ Light & dark, 5 languages A first-class dark mode, and full support for English, 한국어, 日本語, Deutsch and Português (Brasil). Your device data is read to be shown on screen. Exports leave the device only when you share them yourself. RynDevice shows ads (Google AdMob); ad-related data is described in the privacy policy: https://cs.devryner.com/apps/ryndevice/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: CPU at 15.6 against RynDevice's 26.0. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | CPU | RynDevice |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily | — |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Renya Miyahara | Chi Won Choi |
In-app purchases
CPU
No in-app purchases
RynDevice
No in-app purchases









