Hi, I'm Harleen — an engineer with a poet's heart.

I founded Cha.AI to build bespoke tools that fit your flow.

🏠 Calyn

It all started when I realized corporate tools don't work for my household — I was spending more time making them work for me than they were saving me.

I built my first app, Calyn, just to keep our family in sync across the patchwork of apps every household ends up juggling: the WhatsApp classroom group, school emails, Smore newsletters, SignUpGenius slots, birthday Evites, the spreadsheet for soccer carpools and Girl Scout meetups, local events buried in Facebook and Instagram, and our own family and friends scattered across email, WhatsApp, and Messenger.

🩺 Migraine Tracker

Then I turned that same instinct on myself. My paper notes kept getting lost. My kids displaced my diary. And on the good days, I'd simply forget to log — which meant the one thing I actually needed, the pattern behind my triggers, never had a chance to show up. Now: a quick voice note mid-migraine becomes a structured, doctor-ready record, with reminders built in so tracking happens every day, not just the bad ones.

Fun fact: it was that migraine log that inspired me to build Oku, an observation journal, next.

From there, I started helping the people around me the same way — building small tools shaped around their little annoyances, not what off-the-shelf software assumed they needed.

See the tools I've built for others →