A paper ledger
that fits in your pocket.
Kakeibo started as a notebook. Software is good at arithmetic and sharing the book — so those are the two things yen-yen fixes. The four questions stay.
- The arithmetic is free. Monthly portraits and budget burndown — computed, not tallied at the kitchen table.
- The whole household holds the ledger.Up to five people, one answer to “where did the money go?”
- Statements paste in. You still answer the questions before anything saves.
- No bank login, ever. Your credentials stay yours.
Need · Want · Culture · Unexpected
Where does your money actually land?
Every transaction gets a kakeibo class. After a few weeks, your breakdown tells a story. Drag the sliders to explore what yours might look like.
Your spending personality
The Practical Planner
Based on your kakeibo balance · updates in real time
yen-yen computes your real breakdown after 2 weeks of entries. The balance score guides your Sunday reflection — not as a grade, but as a conversation starter.
Every spend still answers one of the four questions. Try the app without an account — signing up later is one email.
Claim a founder spot.
Install on your phone — the demo runs straight from the app icon. Founders get household sharing, statement import, and Ask included. If it isn't for you, walk off with no email left behind.
No card. First 100 households only.