entry no. 1
Udhar tracking that sticks
Add an entry in 5 seconds: customer, amount, done. Every khata searchable, every balance live. No more 'likha tha kahin'.
udhar khata, minus the udhar of remembering
Your paper khata
belongs in a museum.
ExtinctBook tracks every customer's udhar, sends payment reminders on WhatsApp, and shows your day's profit in one tap. The register survived 200 years. It won't survive this.
उधार याद रखना अब app का काम है, आपका नहीं।
a brief history of hisab
Five eras of bookkeeping. Four are fossils.
3000 BCE
Stone tabletextinct
Heavy. Zero search. Customer disputes settled by whoever lifts it.
1800s
Bahi-khataextinct
Red cloth, sacred on Diwali, unreadable by February.
1990s
Plastic-cover registerextinct
One pen tied with string. Pages stuck together with cello tape.
2010s
The Excel sheetextinct
Updated twice. Formula broke in March. Nobody dared touch it again.
Now
ExtinctBook
Every entry backed up, every udhar reminded, every evening a clean total.
what's written inside
Four things your register never did for you.
entry no. 2
WhatsApp reminders that get replies
Polite, automatic payment reminders with a payment link, sent from your shop's name. You stay the nice guy. The app does the awkward part.
entry no. 3
Daily profit, one tap
Close the shutter, open the app: today's sales, today's udhar, today's collection. Hisab done before the chai gets cold.
entry no. 4
Works without internet
Counter pe network nahi hai? Doesn't matter. Entries save offline and sync when the bars come back. Built for real shops, not demo videos.
by the numbers
Built for the real India.
6 crore+
small businesses in India we're building for
₹0
core khata cost — free, forever
5 sec
to add an udhar entry
"WhatsApp reminder bheja aur usi din payment aa gayi. Pehle poochhne mein sharm aati thi."
"End of day profit dikhta hai ek tap mein. Mujhe pata nahi tha mera actual profit kitna tha."
reserve your page
Built for the 6 crore+ small businesses of India. Starting with yours.
puchne se pehle
Questions shopkeepers actually ask.
Is my khata data safe?
Yes. Entries are encrypted in transit and at rest, backed up automatically, and only you can see your ledger. Losing your phone no longer means losing your hisab.
Does it work offline?
Yes. Add entries with no internet; the app syncs when you're back online. Built for real shop counters, not perfect Wi-Fi.
Is it free?
The core khata is free: unlimited customers, unlimited entries, WhatsApp reminders. Paid extras for power users come later, and the free part stays free.
Hindi support?
Haan ji. Full Hindi interface, and Hinglish-friendly search, so 'Sharma ji' and 'sharma' find the same khata.
When is iOS coming?
It's hatching. Join the waitlist with iOS selected and you'll get it the day it lands on the App Store.
How is this different from Khatabook?
Sharper WhatsApp reminders that actually get replies, a one-tap daily profit summary, offline-first sync, and zero clutter. A khata, not a super-app trying to sell you nine other things.