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Now live — InvoiceNG Free, InvoiceNG Pro, RetailNG Beta

Stop losing sales to
messy WhatsApp messages.

Biztack gives you professional invoices and a free point‑of‑sale system — all from your phone, even offline. Join 204+ business owners alreadyusing Biztack to invoice clients, manage sales and get paid — for free.

Start for free — no credit card → See how it works
John Tires logo
PF

Trusted by business owners across Nigeria, UK & Europe

Free
Forever
60s
To invoice
Offline
Works without data
WhatsApp
Ready
3
Countries
The problem

Most small businesses still
operate like it's 2005.

Typing invoices in WhatsApp. Tracking sales in a notebook. Sending blurry Word doc screenshots to customers. You deserve better — and it costs you real money.

Invoices typed manually in WhatsApp

No format, no professionalism, and easy to make mistakes on amounts.

Sales recorded in notebooks

When the notebook is lost, so is your entire business history.

Expensive software built for the West

QuickBooks and Zoho cost more than many small businesses earn in a day.

Apps that don't work offline

Unreliable internet shouldn't stop you from running your business.

Our products

Three tools.
One stack.

Each tool does one thing extremely well. Together, they cover your entire business operations.

Most popular

InvoiceNG

Free professional invoicing via WhatsApp

Free · Beta

Perfect for: Freelancers, tailors, make-up artists, bakers

  • Create professional invoices in 60 seconds
  • Send as PNG, PDF or WhatsApp text
  • Quotations → invoices in one tap
  • Multiple invoice templates
  • Works offline after installation
Open InvoiceNG →

InvoiceNG Pro

Everything in InvoiceNG, plus cloud sync, PDF export and no watermark

Free trial

Perfect for: Growing businesses, agencies, studios

  • Everything in InvoiceNG
  • Cloud sync across devices
  • No watermark
  • PDF export & download
  • Priority WhatsApp support
Coming soon

RetailNG

Simple POS for your shop

Free · Beta

Perfect for: Grocery stores, boutiques, pharmacies

  • Add products with prices & stock
  • Tap‑to‑add product grid
  • Accept cash, transfer or POS
  • Send WhatsApp receipts instantly
  • Track revenue & low stock
Open RetailNG →
How it works

Up and running
in minutes.

1

Open the app

No download. No signup required for basic use. Just open the link on any phone and start immediately.

2

Add your business

Set your business name, logo and phone number. Takes 30 seconds. Saved forever.

3

Send & get paid

Create an invoice or record a sale. Send it via WhatsApp. Get paid. That's it.

Everything you need

Built for how
you actually work.

Designed from the ground up for African business owners — not adapted from software built for someone else.

Works offline

Install as a PWA and it works without data. Create invoices and record sales even when your network is down.

WhatsApp native

Everything is designed to share on WhatsApp — the platform your customers already use every day.

Multi-currency

NGN, GBP, USD, EUR, GHS and more. Works for Nigerian business owners wherever they are in the world.

Quotes → Invoices

Send a quotation first. When your customer approves, convert it to an invoice in one tap.

Stock tracking

Know what you have, what's running low, and what's sold out — before your customer tells you.

Sales analytics

Today, this week, this month — see your revenue, top products and transaction history at a glance.

Invoice templates

Classic letterhead, modern bold, minimal receipt. Choose the look that fits your brand.

Secure accounts

Sign in with just your email — no password to forget. Your data syncs across all your devices.

Instant setup

No IT department. No onboarding call. Open the link, add your business name, and you're live.

What they say

Real business owners.
Real results.

★★★★★

"You are doing great, I'm proud of you. The only thing is that the invoice seems a bit small, but aside from that everything is awesome. Well done!"

John Vincent..
CEO John Tires LTD, Yaba, Lagos
★★★★★

"The UI feels a bit jam-packed after generating an invoice, but aside from that it's realy easy to pick up and use."

Olami Oye.
PlanetF, Lagos
★★★★★

"It was really good when I used it. The fact that it automatically calculates the total cost make it absolutely wonderful - highly recommended."

Daniel aka (Amen Scoosh)..
Luxury Brand, Lagos
FAQ

Frequently asked
questions.

Quick answers to the questions we hear most. Can’t find what you need? Contact us.

Is Biztack really free?
Yes — both InvoiceNG and RetailNG have generous free tiers with no time limit. You can create unlimited invoices and manage your shop without paying a naira. Upgrade to Pro for premium features like watermark removal, PDF export, and cloud sync.
Do I need to download an app?
No download is required. Biztack tools work right in your browser on any phone or computer. You can also install them as a Progressive Web App (PWA) for offline use – just tap “Add to Home Screen” when prompted.
Which countries and currencies do you support?
Biztack supports multiple currencies including NGN (Naira), GBP, USD, EUR, and GHS (Cedi). It’s used by business owners in Nigeria, the UK, Germany, the Netherlands, and across Europe. If your currency isn’t listed, let us know – we can add it quickly.
Can I use Biztack on my phone?
Absolutely. In fact, Biztack was built mobile‑first. The interface works perfectly on any smartphone, and you can send invoices or receipts directly via WhatsApp, which is where most African business conversations already happen.
How secure is my data?
Your data is stored securely and only accessible by you. You sign in with your email (no passwords to forget), and we encrypt sensitive information. When you install the PWA, your data even syncs across devices. We never share or sell your business information.
Our story

Built in Lagos.
For the world.

"I had no money. No job. No income. So I built something — in one week, from scratch, for the business owners I could see struggling around me."
Abraham Olamide James Founder, Biztack · Student & Developer · Lagos, Nigeria
Get in touch

We'd love to hear
from you.

Questions, feedback, or just want to say hi? Drop us a message and we'll get back to you as soon as possible.

biztackapp@gmail.com Chat on WhatsApp

Your business deserves
better tools.

Join 204 business owners already using Biztack to invoice clients, manage sales and get paid — for free.

Start with InvoiceNG → Try RetailNG