Get your money back from customers, without the awkward calls.
VasulBook keeps your udhaar book, sends polite WhatsApp reminders with your UPI ID, and shows every evening who paid and who still owes. For shops, tuition centres, milk vendors, tailors and every business that gives credit.
Then ₹1,000 for 10 months. Works on any phone. Install it like an app.
On iPhone: tap Share, then "Add to Home Screen".
- Ravi Kumar₹1,560Overdue 2 days
- Meena S₹640Due today
- Anitha R₹0All paid
Hello Ravi, your balance of ₹1,560 at Sri Lakshmi Stores is overdue by 2 days. You can pay with any UPI app to lakshmi@okaxis. Thank you.
Made for every business that gives credit
- Kirana & medical shops
- Tuition & coaching centres
- Milk, water & paper delivery
- Tailors & repair shops
- Wholesalers
- Rent & hostels
- Clinics & professionals
How it works
- 1
Note who owes you
Type
Ravi 500 riceand it's saved with a due date. Add customers with their WhatsApp number. - 2
Send a reminder in one tap
A polite WhatsApp message in your customer's language, with your UPI ID or a pay-now link. It gets firmer as days pass.
- 3
Get paid and see it
Record payments in a tap, or let Razorpay mark them for you. Every evening you get a summary of what came in.
Everything you need to collect faster
Simple udhaar book
Credit, payments, due dates and a running balance for each customer, like your paper book but never lost.
WhatsApp reminders in 10 languages
Ready-made messages in English, Hindi, Tamil, Telugu, Kannada, Malayalam, Marathi, Bengali, Gujarati and Punjabi, with your shop name and UPI ID.
Overdue at a glance
See who is overdue, who is due soon, and who often pays late, before you give more credit.
Evening summary
Collected today, new credit and total pending, on your phone and by email at 9 pm.
Works like an app
Install it on your phone's home screen. Your ledger opens even without internet.
Safe and private
Your customers' details are never sold or shared. Only you can see your ledger.
See VasulBook in action
A one-minute look at adding dues, sending a WhatsApp reminder and recording a payment.
One simple price
3 months free
Every feature, no card needed. Cancel anytime by simply not paying.
Start free trial₹1,000 for 10 months
That's about ₹100 a month. Pay once by UPI, card, net banking or wallet through Razorpay.
- Unlimited customers and entries
- WhatsApp reminders in 10 languages
- Evening summary and overdue alerts
- Install on your phone
5 months free
For every business owner who joins with your link. They get an extra free month too.
Questions
Do my customers need to install anything?
No. They get a normal WhatsApp message and pay with any UPI app they already use.
Does it work in my language?
Yes. The app and the reminders work in English, Hindi, Tamil, Telugu, Kannada, Malayalam, Marathi, Bengali, Gujarati and Punjabi. You can also edit any message before sending.
What happens after the free trial?
You can keep using VasulBook for ₹1,000 for 10 months. If you don't pay, your data stays safe and you can still see it; adding entries pauses until you subscribe.
Is my data safe?
Your ledger is stored securely and only you can see it. We never sell or share your customers' details.
Can I use it on my phone and computer?
Yes. Log in on any device. On your phone, install it to the home screen and it opens like an app.