Invoice Maker & Estimate App

MRB Lab

In-app purchases

About this app

Invoice Maker & Estimate App — create professional invoices, estimates, quotes and receipts in under 60 seconds. InvoiceFlint is the invoice maker built for freelancers, contractors, and small businesses who need to bill fast and get paid faster.

No accounting knowledge. No clutter. Pick a template, add your client and items, and send a polished PDF invoice by email or WhatsApp.

⚡ INVOICE MAKER — SEND IN UNDER A MINUTE
Pick a clean PDF invoice template, add your client and items, and send. InvoiceFlint works as an invoice maker, invoice generator, bill maker, and billing app in one — the fastest way to make an invoice on your phone.

📄 ESTIMATE MAKER & QUOTATION MAKER
Send a professional estimate or quote, then convert it to an invoice in one tap when the job is done. The estimate app your clients approve, and the invoice app you get paid from — no re-typing.

🧾 RECEIPT MAKER
Issue a signed receipt the moment a client pays. A simple receipt maker for shops, service providers and cash jobs.

💰 GET PAID FASTER
See which invoices are paid, unpaid and overdue at a glance. Send payment reminders so you stop chasing money and start collecting it.

🧮 TAX, VAT & GST DONE FOR YOU
Add sales tax, VAT or GST with reusable presets. This billing app calculates line totals, discounts and grand totals on every invoice and estimate — no spreadsheets, no math.

📵 WORKS WITHOUT INTERNET
Sign in once, then keep working offline. Build an invoice on a job site, in a basement, or on a plane — everything syncs to your account the moment you are back online.

☁️ YOUR INVOICE HISTORY IS NEVER LOST
Your invoices, estimates, clients, and saved items are backed up to your InvoiceFlint account. Change your phone, lose your phone, or reinstall the app — your full billing history comes back with you. Offline-only invoice apps lose everything when the device does.

✅ INSIDE THE INVOICE MAKER
- Multiple professional PDF invoice templates with live preview
- Add your business logo and digital signature
- Attach photos to invoices and estimates
- Save clients, items and services to reuse instantly
- Invoice numbering, due dates, notes and payment terms
- Discounts per item or per invoice
- Multi-currency and multiple date formats
- Run multiple businesses from one account
- Share PDF invoices by email, WhatsApp or print

👷 WHO USES INVOICEFLINT
Freelancers, consultants and the self-employed. Contractors and trades — builders, electricians, plumbers, painters, handymen, landscapers, cleaners, mechanics. Retailers, tutors, photographers, delivery drivers and small business owners who want simple billing without complicated accounting software.

🆓 WHAT YOU GET FREE
Create your InvoiceFlint account in seconds, then make your first invoices and estimates at no cost — no credit card required. Upgrade to Pro only when you want unlimited invoices, every template, payment reminders, and multiple businesses. You will always know what is free before you start.

🔍 LOOKING FOR ONE OF THESE?
- A free invoice maker with no watermark on your PDF invoice
- An invoice app for contractors and construction job estimates
- A GST invoice app or VAT invoice maker for small business
- A simple estimate and invoice app for small business owners
- An invoice generator that keeps a backup of every invoice
- A quick quotation maker and job quote app for trades
- A small business receipt maker and cash bill maker
InvoiceFlint does all of it in one small, fast app.

Whether you call it an invoice maker, invoice generator, invoice app, billing app, bill maker, receipt maker, estimate maker, or quotation maker, InvoiceFlint helps you create invoices, send them, and get paid.

Download InvoiceFlint and send your first invoice today.

Questions or feature requests? Email [e-mail] — we reply within 24 hours.

What’s new

- Faster PDF generation — invoices export in under a second
- New invoice templates
- Fixed: tax totals on multi-item invoices
- Improved offline reliability
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