The story of Kakeru
How the handwriting memo app “Kakeru” grew from its very first step, on a single page. Every change in development is recorded as a “commit” — 661 of them in total. Born in July 2019 as a personal-project prototype, it stalled and restarted many times, and over seven years spread across a web app, an official site, an iOS app, and the servers behind the scenes.
* Data as of July 2026.
Commits per month
Stacked and colored by the area each change touched. Hover over (or tap) a bar to see that month’s breakdown.
The journey
The web app itself, plus three separate repositories that have since merged into one (a monorepo), woven into a single timeline.
What the commit messages tell us
The short notes left with each change (commit messages) reveal the human side of seven years of development.
Source: the git log of the odiak/kakeru repository (661 commits,
2019-07-14 to 2026-07-07). Areas are a rough classification inferred from the
file locations each commit touched. History from before the monorepo migration
was supplemented from the predecessor repositories odiak/draw, odiak/draw-server,
odiak/kakeru-website and odiak/kakeru-image-server.