Free for one. Less than a coffee for the whole house.
The free ledger keeps working forever, on iPhone and Android, no card and no countdown. yen-yen Plus opens the household features for ¥450 a month — try it free for seven days.
If it's just you.
- The whole ledger — every account, every line, every currency.
- Your data, your phone — daily local backup, exportable in two taps.
- The four-question habit (or skip it; the ledger still works).
- No ads. No upsells in the menus. No trial countdown.
When the money is shared, the ledger should be too.
- Everyone in the house — up to five members on the same ledger.
- Paste-the-statement parsing — the half-hour chore turned into a coffee sip.
- Quiet roles — owner, contributor, viewer — so private things stay private.
- Longer audit retention and priority support, usually inside a day.
Subscription details
yen-yen Plus is an auto-renewing subscription billed monthly (¥450 / $2.99) or yearly (¥2,800 / $19.99). The first seven days are free; after that, your default payment method is charged at the start of each period. Renewal can be turned off at any time from your App Store, Google Play, or web billing portal at least 24 hours before the period ends — once turned off, access stays on through the end of the paid period. The free ledger keeps working forever whether or not you ever subscribe.
By subscribing you agree to our Terms of Use and Privacy Policy.
Running a small shop or studio that needs more than one workspace, deeper roles, or SSO? Tell us at kensaurus@gmail.com and we'll move the Team tier up the queue for you.
The questions we get asked the most.
01Do I have to give you my bank password?
Never — and please never give it to anyone who asks. yen-yen reads bank statements you paste in (a PDF, a CSV, or just the lines you copy from your banking app). Nothing is saved until you tap save.
02Will my partner see my therapist or my surprise gift?
Only what you choose to log to the shared household ledger. Each member also has a private workspace that only they can see. Use it for personal things; share what's actually shared.
03Where does my data actually live?
In a Postgres database in Tokyo, encrypted at rest, with row-level security so no other yen-yen user — and no other household — can read your rows. You can export the whole thing as CSV or QIF in two taps, and delete your account in two more.
04Does the AI see my whole bank account?
Only the lines you paste, only at the moment you paste them. It doesn't see your balance, your other accounts, or anything you didn't hand it. We log how much each parse cost so you can audit it yourself in Settings.
05We've been arguing about money for years. Will an app fix that?
Honestly, no app can. But most money fights start with one person not knowing where the money went, and yen-yen makes that part take ten minutes. The conversations that follow tend to be calmer when both people are looking at the same numbers.
06Why 'yen-yen' if I don't live in Japan?
Doubling a word is how friendly questions sound in Japanese — a soft "money, money?" whispered to yourself at the end of the month. The app speaks 27 currencies; use whichever ones fit your life.
07Will there ever be ads or upsells?
No ads, ever. yen-yen Plus (¥450/mo or ¥2,800/yr, 7-day free trial) covers household sharing, AI statement parsing, longer audit retention, and priority support. The free ledger keeps working forever whether or not you subscribe — we'd rather lose you to another budgeting app than serve you an ad next to your grocery line.
08How does the seven-day free trial work?
When you start yen-yen Plus you get the household features for seven days at no charge. You can cancel any time from your App Store, Google Play, or web billing portal — if you cancel before day seven, you're never billed. After the trial, ¥450 a month (or ¥2,800 a year, billed once) renews automatically until you turn it off. Once you turn renewal off, access stays on through the end of the paid period.
Try it before you sign up.
Install on your phone — the demo runs straight from the app icon. Log a coffee, watch the bar move. If it feels right, your real ledger is one tap away. If not, walk off with no email left behind.