Junichi Sato

Indie maker. Building tools for makers.

@shirokumamake 133 X followersshirokumamake.jp First product launched 6mo ago

100% full-depth creator dossier open: complete product portfolio, 12-month combined traffic & MRR curves, shipping cadence, and timeline events.

Products

Products and research metrics
Product	Tagline	Category	Visits · Sep	MoM	Launched	Revenue	Actions
Kosshikosshi.appOutliner for Mac, iPhone, and iPad	Outliner for Mac, iPhone, and iPad	Notes & Knowledge Management	<5K	Prev <5K	2026-05	Undisclosed

Launches, marketing, revenue milestones, and pricing/plan/positioning changes across products

Nov 12 · 3d ago
- Kosshi 1.23 released on the App StoreProduct Activity
  Kosshi released version 1.23 on the App Store. The update introduces formulas, Quick Find for rows, recent edits, bookmarks, and new note-adding shortcuts.
May 23 · 6mo ago
- Kosshi launchedNew product