I track everything in my Google Calendar — work blocks, side projects, gym, social time. But I could never answer 'where did my time actually go this week?' Google Workspace has Time Insights, but it's locked to paid accounts and doesn't work for personal Google Calendar.

Calens fills that gap: GitHub-style heatmap showing 52 weeks of calendar activity, weekly/monthly time breakdowns by calendar or tag, a progress chart of planned vs completed time, and a cleaner in-page event editor. Everything runs on-device — no servers, no tracking, no data leaving the browser.

Early-stage, looking for people who already log their life in Google Calendar and want better data on their habits. Happy to give free lifetime access in exchange for honest feedback.

Working on a startup that aims to make decarbonisation profitable, and speed up the clean energy transition based on the RRETS idea:

https://www.why5.uk

The explainer video is here:

https://www.why5.uk/services

I would appreciate any feedback. Thank you!

Built Echomindr this week — extracted 1,150 structured decisions, lessons, and signals from 96 podcast episodes (HIBT, Lenny's, Acquired, YC, 20VC) and made them searchable via API and MCP server.

The idea: AI agents give generic startup advice. This gives them access to what founders actually did, with verbatim quotes and timestamp links to the source.

Stack: Deepgram + Claude + SQLite + FastAPI. Total cost under €50.

https://github.com/echomindr/echomindr

You're not david927 ;).