Fufu Seisan (couple expense settlement)
Fufu Seisan (couple expense settlement)
Reads each month's card and bank statements, has AI sort every line into family, personal or needs-review spending, and shows who has paid more than their share.
What this app does
Reads each month's card and bank statements, has AI sort every line into family, personal or needs-review spending, and shows who has paid more than their share.
Who uses it
This is a personal tool operated by Hidenobu Nagai. Access is limited to the operator and the small number of people he has allowed. It is not a commercial product and it is not offered to the general public.
Platform
Cloudflare Workers (Hono worker and a React app, with Cloudflare D1 and Workers KV)
Google user data and how it is used
The Google email is used only to sign the person in and to restrict the app to the two allow-listed accounts.
- Email address of the signed-in Google Account, checked against an allow list of two people
- That email address, stored in the signed 30-day session cookie and shown on the settings screen
Where the data is stored
- The app's own Cloudflare D1 database (members, cards, months, transactions, learned merchant rules, settings, settlements)
- Uploaded statement files in Cloudflare Workers KV
- A 30-day signed session cookie; no browser local storage and no analytics storage
Services that receive data
| Service | What it receives |
|---|---|
| Google Sign-In | The sign-in request and the returned account identity. |
| Command Code API (AI providers) | The uploaded statement text and images, used to extract and classify transactions, with zero data retention configured. |
| Google Fonts | The visitor's IP address when web fonts are loaded. |
Note
Statement contents are sent to AI providers to read and sort the transaction lines.