Download
Tefter — macOS
For Apple silicon and Intel
Requirements: macOS 12 or later
Download and install
Check your processor
Apple menu → About This Mac. If it says "Chip Apple M…", pick Apple silicon; if it says "Intel", pick Intel.
Drag Tefter to Applications
Open the downloaded .dmg file and drag the Tefter icon into the Applications folder.
First launch
Open Tefter from Applications. If macOS says it can't verify the app, go to System Settings → Privacy & Security and click "Open Anyway". You only need to do this once.
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.