Less paperwork.
More work.
Organise your jobs. Run your business. Quote from your phone in 2 minutes, send it on WhatsApp, chase payments with one button — and your VAT ready for your accountant.
Built for a tradesman's day
A quote in 2 minutes
Labour lines, materials, VAT worked out automatically. A PDF with your logo, ready to send.
Chase on WhatsApp
One button sends a polite reminder with a link to the invoice. No more awkward phone calls.
Know who owes you
Outstanding and overdue at a glance. Partial payments, history per client.
Expenses by photo
Snap the receipt, enter amount and category. Input VAT works itself out.
VAT without the stress
The VAT form boxes per quarter, with a CSV for your accountant. Cyprus rates.
From your phone, on site
Works on any phone, in Greek or English. No install, no training.
Stop losing money to lost receipts.
Every receipt that vanishes in the van is VAT you never claim back. Photograph it at the supplier's counter, record the expense in ten seconds, and the VAT lands in your quarter by itself.
✦ Coming soon: AI reads the receipt from your photo and fills in the supplier, amount and VAT for you.
How it works
Name, trade, phone. Nothing else.
Build it on your phone, send it on WhatsApp.
An accepted quote becomes an invoice automatically.
One-button reminders, payments on record.
Ready for e-invoicing.
The EU is making e-invoicing mandatory. Every MastrosBook invoice already exports to the European Peppol standard, so when the law reaches Cyprus, you are already covered.
One price. Everything in.
Frequently asked questions
How much does it cost?
The first month is free for everyone, no card needed. After that, €14.90 a month: less than half an hour of your labour. You are never charged without approving it in the app.
Do I still need an accountant?
Yes. MastrosBook keeps your records in order and prepares the numbers, but your accountant files the returns. They will thank you for not bringing a shoebox of receipts.
Does it work on my phone?
It was built for the phone. Opens in the browser, no app store install, and you can add it to your home screen like a normal app:
iPhone (Safari): tap the Share button ⎋ at the bottom, then "Add to Home Screen".
Android (Chrome): tap the ⋮ menu top right, then "Add to Home screen".
Is my data safe?
Your data belongs to you, travels encrypted, and you can export it any time. No other user can ever see your clients or invoices. Data is stored on servers in Germany, within the EU.