Raj Patel
Hi — I'm Raj. I built Kael because I watched sharp people lose hours to their phones, and I wanted a focus tool that doesn't just say no, but knows when yes is right. For the Berkeley AI Hackathon, I ported Kael to Windows from scratch in a single weekend — my first time ever writing C# and WPF.
Kael for Windows
A full native Windows port of Kael, built from scratch over a single weekend — the same context-aware judgement that asks why before you scroll, now on the desktop most students actually study on.
Blocks apps at launch.
Instagram, TikTok, Discord, Steam — intercepted the moment you open them on Windows.
Other Windows blockers just block.
Hover any row for the detail.
Compared against popular Windows focus tools as of Jun 2026. Notice something wrong? Tell us— we'll fix it.
See Kael for Mac and iPhone.
The same intercept and Claude reasoning, on the devices you already use.