Best Khata Book App for Shopkeepers in India (2026) — OkCredit, Khatabook & Billing Software Compared

Every shopkeeper in India runs some version of udhaar — a regular customer buys on credit, pays it off over a week or a month, and the shop keeps count. For decades that count lived in a paper khata book. Apps like OkCredit and Khatabook digitized that ledger, and a lot of shops switched over for the reminder messages and the backup alone. But a khata app only solves one part of running a shop: the credit. It doesn't bill the sale, doesn't track the stock that sale came out of, and doesn't file the GST. This guide covers what a khata book app actually needs to do well, how OkCredit and Khatabook handle it, and when it makes more sense to run udhaar inside billing software instead of next to it.

What a digital khata app replaces

A paper khata book does three things: records who owes what, records when they paid, and gives the shopkeeper something to point to if a customer disputes the balance. A digital khata app does the same three things, with two real upgrades — the customer gets a payment reminder without the shopkeeper having to call them, and the ledger survives a lost notebook or a fire.

OkCredit and Khatabook are the two apps most Indian shopkeepers have heard of, and both do this well. Add a customer, log a credit sale or a payment against their name, and the app keeps a running balance with a full history. Both are free to use for basic ledger tracking, work in regional languages, and send the customer a reminder on WhatsApp or SMS when a balance is due.

Where a khata-only app runs out of road

The udhaar entry itself is only half the transaction. The other half is the sale that created it — what was sold, at what price, whether GST applied, and what came out of stock. A khata app has no idea what the ₹850 balance against a customer's name was for, because it was never connected to a bill in the first place. That gap shows up in three places:

• Double entry — the shopkeeper bills the sale in one system (or on paper) and then logs the same sale again in the khata app if any part of it went on credit. Every credit sale gets typed twice.
• No link between stock and credit — a khata app tracks money owed, not what left the shelf. A shop can't see which products are actually driving its outstanding udhaar without cross-referencing two separate systems by hand.
• GST is a separate problem entirely — none of the popular khata apps generate a GST-compliant invoice. A GST-registered shop still needs billing software on top, which means udhaar tracking lives in one app and the legal record of the sale lives in another.

For a shop that only takes cash and never bills anything formally, that gap doesn't matter — a standalone khata app is genuinely enough. For a GST-registered shop billing every sale, it means running two systems that don't talk to each other.

What a khata feature needs when it's built into billing software

The alternative is udhaar tracking as part of the same system that bills the sale, not a separate app next to it. Done properly, that means:

1. Credit is marked at the point of billing, not re-entered later

Instead of billing a sale and then separately opening a khata app to log the unpaid portion, the credit sale and the udhaar entry are the same action — mark the invoice as credit (full or partial), and the customer's ledger updates automatically. Nothing gets typed twice, and nothing gets forgotten because the shopkeeper was busy at the counter.

2. The ledger is genuinely a ledger, not a balance

A useful udhaar record shows the full history per customer — every invoice that contributed to the balance, every payment against it, and the running total — not just a single number that resets when someone pays something. That history is what settles a dispute when a customer says they already paid.

3. Reminders go out without a manual WhatsApp message

Sending a payment reminder for a genuinely overdue balance, in a tone that doesn't sound like a threat, is uncomfortable for most shopkeepers — which is often why it doesn't happen until the balance is embarrassingly large. Billing software with reminders built in can send it automatically on a schedule, and a free Payment Reminder Generator covers the one-off cases where a shop wants to send a message by hand, with polite, friendly, and firm tones already drafted.

4. Outstanding udhaar shows up as real, trapped cash

The other cost of udhaar is invisible until someone adds it up: every rupee sitting in a customer's unpaid balance is cash the shop can't spend on new stock. A shop can check this directly with the free Working Capital Calculator, which estimates how much cash is trapped between slow-moving inventory and outstanding udhaar.

Khata book apps vs billing software with udhaar built in

OkCredit and Khatabook — free, mobile-first, simple to hand to any staff member, and genuinely good at the one job they do: tracking who owes what. They don't bill, don't manage stock, and don't generate GST invoices, so a GST-registered shop still needs separate billing software regardless.

Astra Atlas — bills the sale, tracks the stock that sale came from, generates the GST invoice, and logs the udhaar in the same action, all in one system. It is not a dedicated consumer khata app and doesn't try to be one — the tradeoff is a system built for a GST-registered shop that bills formally, not a shop running informal cash-only udhaar with no billing at all. The free plan covers up to 30 products, enough to try the udhaar and billing flow together before committing to a paid plan.

Which one actually fits your shop

If a shop is cash-only, doesn't bill formally, and just needs to remember who owes what, a standalone khata app like OkCredit or Khatabook is the right, free tool for that job. If a shop is GST-registered and already billing every sale, running udhaar in a second, disconnected app means double entry on every credit sale and no real link between the credit ledger and the stock or the tax record. That's the case where udhaar belongs inside the same billing system — see Astra Atlas vs Tally vs Vyapar for how the billing side compares beyond just the ledger, or What Is Astra Atlas for the full feature rundown.

For a kirana or general store weighing this decision alongside GST setup, the GST billing software guide covers the compliance side in detail. And if WhatsApp reminders for udhaar are the main draw of a khata app, WhatsApp tools for shopkeepers covers the free tools for that specifically, separate from full billing.