Why the 25-minute rule breaks for ADHD
The Pomodoro technique was invented in the late 1980s by Francesco Cirillo, who timed his study sessions with a tomato-shaped kitchen timer (pomodoro is Italian for tomato). The original rule is 25 minutes on, five off, in strict blocks. It works well for neurotypical brains on a stable-energy day.
ADHD does not have a stable-energy day. Working memory fluctuates, novelty matters more than willpower, interest-based attention beats time-based attention, and any rigid externally-imposed structure feels like a fight on the days you don't want one. The 25-minute block is treated like a law you break when you're "bad at focus," when actually you're just in the wrong mood for it.
What actually works
Research on Pomodoro with ADHD converges on a few principles: flexible intervals that match energy state, interest-based framing that makes the content feel voluntary, immediate rewards at the end of each block, and permission to abandon a session without shame if the mood was wrong. Put together, the new rule is less "focus for 25 minutes" and more "focus for however long feels right, and end the session with something you're glad you got."
How Catch the Ghost implements this
Four design choices sit directly on the research.
A Pomodoro that actually bends.
Free to download. Free to use. The core loop works on the Free tier; Pro adds content and overnight multipliers.