Open customer
Tap any customer in your khata. Their balance and history appear instantly.
feature spotlight
WhatsApp payment reminders — udhar wapas without the awkward call
ExtinctBook sends a WhatsApp message with the outstanding amount and a payment link. The customer pays directly from the chat. You do not have to call. They do not have to visit.
How it works — three steps
Tap Send Reminder
ExtinctBook fills in a WhatsApp message with the customer's name, amount due, and a payment link.
Customer pays
They see the message on WhatsApp and pay directly from the link. Balance updates in your app.
Why WhatsApp reminders work better than calls
Less awkward
Calling a regular customer about money feels uncomfortable. A WhatsApp message is indirect, non-confrontational, and has a higher response rate.
Payment link = instant action
When the message includes a link to pay, the customer can act immediately — from the same screen where they read the reminder.
They can forward it to family
If someone else in the household handles payments, they simply forward the message. Try doing that with a phone call.
You have proof
The WhatsApp message is a record that the reminder was sent, on a specific date, for a specific amount. No dispute possible.
Included in the free tier
WhatsApp reminders are free in ExtinctBook — no paid plan, no per-message charges. Unlimited customers, unlimited reminders.
before you go
Frequently asked questions
How do WhatsApp reminders work in ExtinctBook?
Open any customer in ExtinctBook, tap 'Send Reminder', and the app opens WhatsApp with a pre-filled message showing the outstanding amount and a payment link. One tap and it is sent.
Does the customer need to have ExtinctBook installed?
No. The reminder is sent over WhatsApp as a message. The customer only needs WhatsApp — no app download required on their end.
Can I customise the reminder message?
Yes. You can edit the default reminder text. The customer name and outstanding amount are filled in automatically.
Is WhatsApp reminder feature free?
Yes. WhatsApp reminders are included in ExtinctBook's free tier. No paid plan required.
Also see: Daily Profit Tracking · Digital Khata · WhatsApp payment reminder guide