Introducing SpinCat

Most system monitors ask you to read. A number here, a graph there, a color that means something if you remember the legend. SpinCat asks you to glance.

It’s a cat that lives in your menu bar and spins in step with your Mac’s activity. When your machine is idle, the cat rests. Kick off a build, a render, or a training run, and it spins faster. You feel the state of your Mac without parsing anything.

Activity, not just numbers

The spin speed is driven by real CPU and GPU utilization. You can choose which drives the animation — the maximum of the two, CPU only, or GPU only — and dial in sensitivity, rotation speed, and a frame-rate cap. SpinCat honors Reduce Motion and eases off under thermal pressure, so it’s never the thing making your Mac warm.

The details are one click away

Click the cat and a popover slides down with two rows of tiles: your system metrics (CPU, GPU, memory, disk, network) and any AI providers you’ve enabled. Select a tile to see its current value and a 60-second history chart, right alongside the settings for that metric.

Want a number always visible? Pin any metric as its own menu bar item and arrange them in the order you like.

Small and private

SpinCat runs as a menu bar accessory — no Dock icon, no window in your way. System metrics are read entirely with local macOS APIs. No analytics, no telemetry, no background network. The only time SpinCat touches the network is the optional AI usage feature, and only after you turn it on.

Give your menu bar a cat. See your Mac breathe.