Kei
01 · Log
Log it without tidying everything
Amount, category if needed, done. Recent suggestions stay on the device and save you the repetition.
Private beta · iOS & Android
You log the expenses.
You log the expenses.
The math is on Kei.
How much you can still spend this month, what's coming next between subscriptions and installments: Kei does the math on your phone, even offline. The choices stay yours.
No account · no bank linking · free during the beta
“Numbers aren't decisions. You decide, Kei counts.”
Most budgeting apps ask you for discipline and hand you charts. Kei starts from one simple gesture — logging the expense when it happens — and gives you a concrete answer: how much margin you actually have.
How it works
Three gestures, zero spreadsheets.
02 · See
Your margin, not your balance
Each category has its own breathing room: you see at a glance where you're on track and where things are getting tight, no mental math.
03 · Look ahead
Next month is already counted
Subscriptions, installments, and planned expenses are counted before they land. You know what's coming, without chasing charges.
Privacy
Read the full privacy policy →
Your data stays under your control.
Everything on your phone
Your expenses live in a local database on your device. No server, no account, works offline too.
Zero tracking
No ads, no profiling, no data sold. Anonymous usage statistics are sent only if you turn them on, and never include what you type.
Backup in your cloud
Automatic backup goes to iCloud Drive on iPhone and to Google Drive on Android: in your own account, in a space reserved for the app.