Alleno Ora
I wanted to actually have access to my workout information without having to rely on a 3rd party app. So I made a CLI tool that helps me quickly create and manage workout data, it’s written in C++.
I use a local SQLite database to store that information, making it easy to do data analysis on it for any metrics you wish to monitor.
(Currently the CLI tool does not have this data analysis functions built in, but it is planned to be added in the future)
You can find the source code here