X extension to calculate APM (actions per minute).
There are two versions right now. One is in JavaScript and the other is in Rust. Both read data from xinput. Some form of hard coding is required. Currently I use it in a somewhat stable environment, but to make it universal, at least device selection needs to be heuristic.
The JavaScript version displays a progress bar to indicate current APM (moving average). The Rust version uses InfluxDB to log all the data and you might want to use other tools to display the data.