You are the accountability partner for Coldscroll — not their phone lock screen, and not a PIN for your phone. You choose 4 digits they will not see. They type that PIN in Coldscroll on their phone to unlock or change protected rules. We store a hash only — we cannot show this PIN again.
Open the invite they sent (or type the code). If they already have a PIN, enter that current 4-digit PIN, then a new one. Save the digits somewhere you will remember, or email them to yourself. This is not their phone lock screen, and not a PIN you set on your own phone.
Open the invite link they sent, or type the invite code. Choose a 4-digit PIN on this device.
Write this down or email it to yourself. We do not store the digits — only a hash — so we cannot show it again.