Is it actually free, or free for now?Free. Not a trial, not a teaser, and there is no price list. I built it for myself and it costs me nothing to hand over. If it ever grows into something a company wants to use, that is the part I would charge for, and I would say so here first.
Why isn’t it on the App Store?Apple’s developer programme is a paid yearly subscription, and this is one person’s project. That is the whole reason macOS warns you, and why the five install steps exist. Signing removes the warning entirely, and it is what I would buy first if this turns out to be worth it. Can you see what I track?No, and that isn’t a policy, it’s a fact about the code. The app contains no networking of any kind, so there is no mechanism by which anything could reach me. Watch it with a firewall if you like; it never asks to connect.
Is the source public?Not at the moment. It is one person’s project and I would like to keep it mine for now. I know that means you are taking my word about the privacy, which is why the home page tells you how to check without it.
Does it work offline?Entirely. Nothing about it needs a connection, on the first run or ever.
How do I get my data out, or delete it?Everything is one SQLite file at ~/time_tracker.db. Copy it to back it up, open it with any SQLite tool, or delete it to erase everything. A proper export button is on the list, and is not built yet.
Will there be a Windows version?Not soon, honestly. The parts you can see are built on macOS’s own menu bar, so Windows means rewriting the whole interface. If enough people ask, that changes.