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termux-app
Termux - a terminal emulator application for Android OS extendible by variety of packages.
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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.
Timetrace (https://github.com/dominikbraun/timetrace) is an excellent cli tool for keeping track of time spent on various projects. However, if you are working on a restricted corporate network that does not permit the installation of software, it is difficult to use, especially if said network also restricts outgoing connections so that you cannot ssh to a machine which has timetrace installed.
One option would be to run timetrace in termux (https://github.com/termux/termux-app) on your phone but I decided to build a web front end to timetrace that can be accessed from a web browser on your phone or desktop.