How to Connect to Café Wi-Fi Without Typing the Password
Short answer: if the café shows a Wi-Fi QR code, scan it with your camera. If it only has a printed sign, use an app that reads the network name (SSID) and password from the sign with your camera, then confirm the connection in Android's own dialog.
Option 1: the Wi-Fi QR code
Many cafés print a Wi-Fi QR next to the counter. On most Android phones, the camera app or Google Lens reads it and offers to join the network. No typing at all.
Option 2: the printed sign
Most signs are just text: "Wi-Fi: MoonCafe / PW: latte2024!". Google Lens can copy the text, but you still paste it into Wi-Fi settings yourself and the network name must match exactly.
Why typing goes wrong
Café passwords are long, mix upper and lower case, and use fonts where 0 and O or 1 and l look the same. One wrong character and the phone just says "authentication problem".
Doing it with Signfi
Signfi reads the network name and password from the sign or QR on your device, compares several frames to pick the most likely password, marks look-alike characters you can fix in one tap, and hands the network to Android to connect. It only reads signs you are allowed to use.
FAQ
Is it safe to scan a café's Wi-Fi sign?
Yes, it is the same information the café shows every customer. Signfi reads it on your device and does not upload the image.
Why does my phone say authentication problem?
Usually one character is wrong, often 0/O or 1/l. Check the look-alike characters and try again.
Can an app find a Wi-Fi password I don't have?
No legitimate app should. Signfi only reads signs you can see and does not crack or reveal other networks.