Minimal, low-overhead system monitor with menu bar and widgets. All analytics computed locally. 7-day history and smart alerts included.
A thoughtfully designed system monitor that respects your privacy and your battery.
Get contextual insights when your CPU, memory, or network usage spikes.
All metrics stay on your Mac. Telemetry is completely optional.
Adaptive sampling and efficient rendering minimize battery impact.
Menu bar integration, widgets, and full system theme support.
Essential system metrics presented clearly and beautifully.
Real-time pulse visualization with system/user/idle breakdown
Monitor usage, cache, swap, and memory pressure levels
Track volumes, available space, and disk usage patterns
Monitor charge, cycles, and battery health status
Real-time upload/download rates per interface
Extend CalmStat with custom monitoring cards through our plugin system.
CalmStat never uploads performance metrics. All data processing happens locally. Crash logs and anonymous usage stats are opt-in and fully anonymized.
100% Local Processing
Everything you need to know about CalmStat's features, performance, and privacy.
No. All analytics run locally on your Mac. Your system data never leaves your device. Telemetry is completely opt-in, giving you full control over your privacy.
Yes! Temperature sensors and fan speeds are available through our direct build's plugin system. Get detailed thermal monitoring for both Intel and Apple Silicon Macs.
We don't use unverifiable tricks or aggressive memory purging. Instead, CalmStat explains what's using your resources and suggests safe, effective actions you can take.
CalmStat is designed for efficiency. Typical idle CPU usage is under 0.3% thanks to our adaptive sampling technology that adjusts monitoring frequency based on system activity.
CalmStat supports macOS 12 Monterey and newer. Both Apple Silicon (M1/M2/M3) and Intel processors are fully supported with optimized performance for each architecture.
The Mac App Store version includes core features. The direct build adds plugin support, automatic updates, and advanced customization options not allowed in the App Store.
Still have questions?
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