Show HN: I lost billable hours forgetting timers. I turned my calendar into a DB

[sergentrif]

Hi HN, I’m Adrien. I run a dev agency and work as a fractional CTO. I lost too much billable hours simply because I forgot to start or stop a timer. It’s a friction point that fails exactly when you're most focused on deep work.

I realized my calendar was already a perfect, 100% accurate log of my week. If a meeting or a task happened, it’s in my agenda. So I built Timescanner to turn those [Client] tags in my calendar into invoices.

Why I built it this way:

- Privacy by design: your calendar is the database. We don't store your events on our servers. It’s a Google Calendar / iCal parser that keeps your data where it belongs.

- Zero new habits: if you already use your calendar to manage your day, you’re already 100% done with time tracking.

- Simplicity over complexity: it's a straightforward parser. No "AI guessing", no complex backend. No additional cognitive load.

Happy to answer any questions about how to use your calendar to track your time (and be productive)!

[VERIRoot]

You built something that most ppl will use till end of their job cycle and I loved the timescanner idea btw.

[sergentrif]

Thanks! I really appreciate it. Honestly, my goal was to build a ghost SaaS, something you don't actually have to use or visit daily.

I'm tired of multiplying tools, I wanted a tool that stays invisible. You just use your calendar, as you already do, and run an analysis at the end of the month when you need to send your invoices.