Catalogue record · hackernews
Fumble is a free, open-source macOS menu-bar app that watches how you type all day, finds the keys that actually cost you time, and drills exactly those. Entirely on-device.
Seen on hackernews · last checked 2026-10-27.
The teardown — how it actually charges, which mechanism was found, and the seam worth taking — is in the daily letter. This page carries the record and the signals so search engines and link previews have something real to read; the judgement stays with the readers who asked for it.
Get the daily letterThe same record sits in the full catalogue, where every entry can be searched and filtered by the signals above.