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activitywatch
The best free and open-source automated time tracker. Cross-platform, extensible, privacy-focused.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you want a lot of detail and don't mind the app being a bit larger, check out ActivityWatcher. https://activitywatch.net/
Not exactly what you are looking for but there is a CLI that shows the most shell commands used
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.