Built for Indian small businesses
Ring up the sale.
The whole shop follows.
Search the item, tap it once, take the money — cash, UPI or on credit. Stock, GST, dues and tonight’s report move with that one entry. Nothing gets written twice, and nothing waits for the end of the month.
No card to start10 business typesRuns on the phone you already have
Detergent powder
1 kg · ₹385
Branded atta
5 kg · ₹245
Shampoo
340 ml · ₹150
Toor dal
1 kg · ₹170
Toned milk
1 L · ₹65
Tea leaves
250 g · ₹135
This bill
Stock on 3 items dropped by one each · today went from ₹18,420 to ₹19,239
The counter screen, drawn from the real thing. One illustrative bill — the three lines add to ₹780, 5% GST is ₹39, and ₹819 is what lands in the day’s total.
A day at the shop
The whole day is one bill — it just runs long
From the 7:41 am sale to the 9:05 pm close, nothing is retyped and nothing is left out. This is a kirana counter in Indore, printed the way the app actually keeps it: every invoice, every stock dip, every credit entry, and the report that shuts the shop for the night.
Balaji Kirana
Indore · GSTIN 23ABCDE1234F1Z5
05-11-2026
INV-2026-0101…0134
First bill · 2 items
Atta 5 kg, toor dal 1 kg. Raised before the shutter was fully up.
₹620
Wholesale bill · 14 items
Hotel supply. Tax invoice with your GSTIN and the slab-wise breakup.
₹4,860
Detergent 500 g — 3 left
Below the reorder point, so a purchase order was drafted for the vendor.
stock
On credit · Ramesh Ji
Collect by 20 Nov. It sits in dues ageing from the same entry.
₹1,200
Return · Basmati 1 kg
Credit note CN-2026-0003 against the original bill, paid back in cash.
−₹150
Rush · 9 bills in 20 minutes
Barcode in, amount keyed, UPI confirmed — the fastest took 11 seconds.
₹5,735
Last bill · 6 items
UPI again, and the customer had the PDF before leaving the counter.
₹1,010
Day close (Z-report)
Drawer counted note by note, report sent to your CA as a PDF.
report
- Bills raised
- 34
- Gross sales (GST inclusive)
- ₹18,420
- Returns
- −₹150
- GST — CGST ₹574 + SGST ₹574
- ₹1,148
- UPI collected
- ₹5,320
- Still on credit
- ₹1,200
Net for the day
Cash in the drawer ₹11,750
₹18,270
Drawer, counted
- ₹2,000 × 4 = 8,000
- ₹500 × 6 = 3,000
- ₹100 × 7 = 700
- ₹50 × 1 = 50
- total ₹11,750
One illustrative day, built from the shape of real shops’ records. Every number above adds up — gross minus returns is the net, and the notes count to the cash line.
Watch it work
Seven chapters, one film — the parts you open every day
The counter, the GST, a spoken invoice, the review queue, stock refill, your staff and the reports. Nothing here is a recording: every frame is the interface itself, so the film stays true as the app changes.
A bill in ten seconds
Tap the items, take UPI or cash — stock, dues and the day’s total move with it.
Posters and WhatsApp
One line about the offer, a finished poster out
Type the offer in a sentence. The backdrop is painted for your trade, your shop's own name, price and number go on top, and Share hands the finished image to WhatsApp, Instagram or Messages from your phone. Nothing reaches anyone until you press send.
- The order code printed in the corner is your WhatsApp number when the shop's number is a mobile, and your review page when it isn't. It is never invented, and it is never on a poster whose shop has a landline.
- Whatever comes back that way — an order in WhatsApp, a star rating — arrives marked Scan QR and waits in your queue. Ratings do not reach your wall on their own.
- Campaign numbers count the chats you actually opened against the customers you have. No impressions, no reach we cannot see.
Sai Bhojanalay · Kothrud, Pune
Story · 1080 × 1920
Six trades, six sample shops. No order code on these — every one of them holds a landline, and a landline cannot carry one. A shop whose own number is a mobile gets the code printed in that corner automatically.
10 business types
Set up for your trade, not a generic one
Pick your type during signup and this is what actually changes — the screens you get, and the extra fields on every bill you raise. Running more than one outlet is not a trade: branches come with the Business plan.
Choose your trade
Restaurant
Restaurant
Menu, tables, KOT — and this is what Zentra reshapes around it.
Pricing
Plain pricing, no surprises
Every plan opens with a 7-day free trial. Upgrade, downgrade or cancel whenever you like.
Starter
One shop, billing done right
₹1908 billed yearly
- GST billing & invoice
- Unlimited bills, no per-bill charge
- Basic sales reports
Pro
Most chosenThe full counter: stock, people and follow-up
₹4788 billed yearly
- Everything in Starter
- Stock & inventory management
- Customers & staff
- Payments & payment reminders
- WhatsApp marketing & posters
- PDF bills and Excel exports
- Up to 1 GB of photo storage
Business
Many stores, and the machine does the typing
₹9588 billed yearly
- Everything in Pro
- Barcode scanning at the counter
- 2 branches included, ₹99/mo for each extra
- Advanced analytics
- AI bill making — photo to invoice
- Fair use: ~100 AI bills a day keeps it fast for everyone
- Priority support
Prices exclude GST. UPI, cash and card payments are available on every plan.
Every shop's data is locked to its own shop
Guarded in the database, not in the app code: an account that is not a member of a business reads zero rows from it. Checked table by table, not assumed.
Backed up every night, kept somewhere else
The whole database is dumped nightly and a copy is stored away from the machine that serves the app, so a dead laptop is not a lost shop.
No advertising or third-party analytics
We count visits to our public website and collect error reports on our own server. Visits inside your account are not counted. No advertising pixels, no third-party analytics SDK, and no selling your customers' data. Our Privacy Policy explains what is collected.
Your name on the bill, not ours
Invoices, posters and shared PDFs carry your shop's name, address and GSTIN. Our own details are on the legal pages.
Questions
Before you sign up
Do I need a credit card to start?+
No. The first 7 days are free with no card and no commitment. Add payment details only if you decide to continue.
Are the invoices GST-compliant?+
Add your GSTIN once and every invoice is generated with the correct tax breakup, HSN codes and totals — ready to print or share. Shops that don't charge GST get a bill of supply instead, with no tax line.
Will it work on my phone?+
Zentra is an installable web app. Add it to your home screen and it behaves like a native app on phones, tablets and laptops. Nothing to download from a store, no machine to buy.
What happens after the 7-day trial?+
Pick a plan, or do nothing and your account pauses. Your data stays intact and you can resume on any plan later.
Your first 7 days are on us
Billing, inventory, customers and reports — set up in an afternoon, with no card to hand over.