Download the Grinfetti app from the App Store on your iPad (landscape orientation is supported). On first launch you complete a short setup:
- Sign in with the same account you use on the website (email/password, Google, or Apple).
- Choose the event you want to run on this device.
- Set a 4-digit PIN — this protects booth settings from guests.
After setup, guests see your welcome screen, enter their name (or skip), and start taking photos. To change event or account later, open settings from the booth screen and enter your PIN.