Written with people moving from Turkey in mind. The Portuguese rules still apply more broadly.
The SIGA App: Skip the Line
The SIGA app is the secret weapon for navigating Portuguese bureaucracy. It allows you to book appointments for Social Security, IRN (Registry), and Tax offices directly from your phone.
More importantly, for some services, you can pull a "digital ticket" before you arrive at the location. This means you can wait in a café instead of standing in line, receiving a notification when your number is about to be called.