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G-CPU Monitor: per-core CPU graphs and home-screen widgets.

G-CPU Monitor plots live frequency and load for each CPU core on your phone, alongside RAM usage and battery temperature. A home-screen widget shows the most recent readings without opening the app. The feature set is the same on iOS and Android.

iOS · Android · Free Home-screen widget
G-CPU Monitor app icon

G-CPU Monitor — CPU, RAM & Widget

★★★★★ 4.9 · App Store + Google Play · by AI Builder

G-CPU Monitor is a real-time CPU and memory monitor with a matching interface on iOS and Android. The main view plots per-core frequency and load over time, so you can see how the SoC schedules work between performance and efficiency cores and where sustained load causes the clock to step down. A home-screen widget mirrors a compact version of the same data.

Download on the App Store Get it on Google Play See full details →

What G-CPU Monitor shows.

  • Per-core frequency and load. Each performance and efficiency core has its own curve, so you can see how work is distributed across the cluster.
  • RAM usage. Total, used and available memory plotted over time.
  • Battery temperature. The current temperature as reported by the operating system.
  • Home-screen widget. A compact view of the most recent readings on both iOS and Android.
  • Passive by design. The app reads values exposed by the operating system and does not modify scheduling, CPU governors or background apps.

Other apps in this space

A few other well-known CPU and system monitor apps. Each has a slightly different focus.

CPU Monitor — Temperature, Usage, Performance

Android · GameBench

An Android CPU and temperature monitor with an in-game overlay mode that is useful while playing.

Get it on Google Play
3C CPU Manager icon

3C CPU Manager

Android · 3c

A power-user tool focused on CPU governors and frequency control. Most controls require a rooted device.

Get it on Google Play

Cooling Master

Android · App Generation

An Android utility that focuses on summarising thermal state and reducing background activity. A different approach to monitoring.

Get it on Google Play

System Monitor Lite

iOS · Daniel Storm

An iOS CPU and memory monitor with a simple graph view. Useful as a lightweight overview on iOS.

Download on the App Store
CPU Info icon

CPU Info

Android · KG Soft

A compact Android utility that focuses on static CPU specifications with a simple live graph.

Get it on Google Play

Frequently asked questions

Does G-CPU Monitor show per-core graphs on iPhone?
Yes. Each performance and efficiency core has its own frequency and load curve, sampled while the app is in the foreground.
Does G-CPU Monitor offer a home-screen widget?
Yes. G-CPU Monitor includes a home-screen widget on both iOS and Android that displays the most recent readings.
Will G-CPU Monitor drain my battery?
The sampler pauses automatically when the screen is off, and the widget uses the system's background refresh budget. In typical use the impact is small.
How is G-CPU Monitor different from a phone cooler app?
G-CPU Monitor is a passive monitor that displays the values reported by the operating system. It does not change scheduling, modify CPU governors or claim to physically cool the device.
What does CPU throttling look like in the graph?
A drop in clock frequency while CPU load stays high. This usually happens after sustained heavy work, such as long gaming sessions or video recording, when the SoC reaches its thermal limit.