"Ultrathink about this." is a special prompt used by Claude Code power users to activate Claude's maximum thinking capacity.
The word "Ultrathink" signals to Claude Code that you want maximum cognitive effort on the task at hand. It's become a shorthand among developers for "think deeply about this problem."
If you're a Claude Code power user, you probably type this phrase 10, 20, or even 50 times a day. That's where this app comes in.
This app is for developers who vibe with Claude Code's deep thinking capabilities and want instant access to that power.