Requirements: Windows 10 or 11, 64-bit
Download and install
Download the installer
Click "Download for Windows". The file Tefter-windows-setup.exe downloads.
Run the installer
Open the downloaded file. If Windows shows "Windows protected your PC", click "More info", then "Run anyway". You only need to do this once.
Open Tefter
The installer adds a shortcut to the desktop and the Start menu.
After installing
Choose: an account or no account
On first launch you choose whether to work without an account (free, data stays on the device) or sign in with your email. You can create an account later and move your data in one click.
Enter your business details
Tax number, registration number, the full business name, address and bank account, exactly as on your APR registration. You enter them once; they print on every invoice.
Issue your first invoice
Add the client by tax number, type the service and amount and issue the invoice. It goes into the KPO book by itself.