Fumble-style typing coach — local all-day keyboard analytics

A local macOS tool that turns your real all-day typing into personalized speed drills, not just the ten minutes you spend on a typing test site.

Problem

People use tools like keybr to get faster, but keybr only sees the few minutes a day you spend practicing on its site, not the ten hours you actually type elsewhere. Your slowest keys quietly cost you time all day, and the trainer has no idea: "Can't improve what you don't measure."

Solution

A macOS menu-bar app that watches keystroke events locally all day, derives per-key and per-pair latency, error and hesitation stats, identifies the keys and finger transitions actually slowing you down, and auto-generates drills built around those weak spots — so practice starts from real-world data.

Users

Developers, SREs, writers, researchers and heavy typists who want measurable improvements in real typing speed and accuracy.

MVP

Local keystroke event aggregation with no replayable content; dashboard of per-key/per-pair latency and error rates; auto-generated drills for weak keys; menu-bar toggle and privacy pause; JSON export for user self-review

Revenue

One-time purchase (~$19) or annual subscription (~$15/yr); privacy-first positioning enables a compliance-focused team edition.

Why now

Privacy-respecting personal analytics tools are resonating on HN; macOS input monitoring is well-understood and doesn't require special permissions, so a single dev can ship an MVP in weeks.