yen-yen – Expense Tracker

yen-yen – Expense Tracker

Track spending. No bank login.

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Free

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Details

  • Released
  • Updated
  • May 15, 2026
  • September 27, 2026

Features

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About

Most budget apps want to log into your bank account. yen-yen doesn't. You type what you spent, hit save, and get on with your day. That's the whole interaction. It's built around kakeibo (家計簿), the Japanese household-ledger habit that's been around for over a hundred years. Every entry asks four small questions: · Did I need it? · Did I just want it? · Does it feed something I love? · Did I see this coming? Sit with the answers for a minute. That minute is the point. FREE, FOREVER Multi-account ledger across cash, banks, cards, and loans. Multi-currency with historical FX so a coffee in Tokyo last March still reads in JPY but totals correctly in your home currency. Budgets and bill reminders. Kakeibo classification on every entry. CSV / JSON import + export. Photo attachments for receipts. Account deletion you run yourself. No ads. We don't sell your data. We never ask for your bank password. OPTIONAL ADD-ONS · Sharing a household ledger with a partner or roommate. · AI-assisted statement parsing — you paste the lines, you approve every row, nothing auto-saves to your ledger. · Longer audit retention. · Priority support. WHAT YEN-YEN WILL NEVER DO · Connect to your bank. · Auto-write AI guesses into your ledger. · Send push notifications about your spending habits. · Show ads. ACCOUNT DELETION In the app: Settings → Account → Delete. You get 14 days to undo it, after which the data is hard-deleted within 24 hours. The Data Safety form lists the same web flow at https://kensaur.us/yen-yen/account/delete. HOSTING + PRIVACY Hosted on Supabase, encrypted in transit and at rest. Privacy policy: https://kensaur.us/yen-yen/privacy Terms: https://kensaur.us/yen-yen/terms Made by kensaurus LLC in Tokyo. Questions or bug reports go to yenyen@kensaur.us — a real human reads them.
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What's New in yen

1.22.13

September 27, 2026

What's new in 1.22.13: • Accounts-first capture, statement cycles, and reward rules (#169) (mobile) • List only real apps in siblings [skip mobile] (#167) (spine) • Rename HTTTG to Cooler Heads [skip mobile] (#166) (kensaurus) • Record yen-yen in the passport on sign-in [skip mobile] (kensaurus) • Draw the passport stamps in the yen-yen cards [skip mobile] (kensaurus) • StampArtUrl and sealArtUrl for the passport stamp art (#146) [skip mobile] (spine) • Htttg AASA entry, mirror check, deep-link tests, associated-domains build guard (#147) [skip mobile] (well-known) • KENSAURUS stamp, passport card, go-links (#145) [skip mobile] (yen-yen) • Weekly funnel scorecard function, script and log (#144) [skip mobile] (kensaurus) • Passport — app links, stamps, kensaurus_me (#143) [skip mobile] (kensaurus) • Localized listings for every shipped locale + listing:check gate [skip mobile] (store) • Spine, canonical app ids and one event taxonomy (#139) (kensaurus) • Delight stamps and findability (#133) (mobile) • Restore ledger chrome and cut stores from main (#132) (mobile) • Ship KENSAURUS footer catalog and BACKLOG (#128) (web) • Declare skin-analysis too, and record why babuu-ai is not (#116) (seo) • Declare all eight apex sitemaps, not three (#115) (seo) • Cross-app KENSAURUS AI credit wallet (#110) (wallet) • KENSAURUS identity ADR + portfolio Organization entity (seo) • KENSAURUS account phase 2/3 - referral + quota services (growth) • Apex deep links for all 4 apps + KENSAURUS foundations (growth) • Hold promotion when no telemetry arrives [skip mobile] (#184) (ota) • Declare Kotlin 2.1.20 so expo-updates' KSP matches the compiler [skip mobile] (#183) (mobile) • Every fresh sign-in failed to load the household (#174) (mobile) • Move Ask and weekly insights off the retired Haiku 3; lock the week-metrics view [skip mobile] (#173) • Google sign-in from demo mode never loaded the workspace; cut PowerSync storage (#172) • Restore Cooler Heads and the apps-only siblings rule that #169 reverted [skip mobile] (#171) (spine) • Restore the spine, catalog and CI changes #169 reverted (#170) • Google secret check, corrected runbook, one probe [skip mobile] (auth) • Generate against kenji, not the deleted project [skip mobile] (db-types) • Canary only follows to Google, per-request timeouts [skip mobile] (auth) • Bridge touches the glot-it app link server-side [skip mobile] (kensaurus) • Answer CORS preflight on browser-callable functions (#138) (kensaurus) • Shared auth-delete guard, entitlement expiry, ingest alias, wallet hardening, anon revoke (#136) (kensaurus) • Refund quota on provider failure (#124) (wallet) • Five authenticated routes were indexable, two unprotected (#120) (seo) • Robots.txt comments broke the CloudFront Function size cap (#117) (seo) • Four AI crawlers were exempt from every apex Disallow (#114) (seo) • Align KENSAURUS entity @id to canonical kensaur.us/#org (seo) • Cheaper kenji cron, embeddings off transactions, filtered Realtime (#176) • Keep PowerSync on the Free plan [skip mobile] (#175) (sync)

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