Go to Settings and turn on PIN lock, then choose 4 digits. GOALD asks for it when you open the app and again after a minute away. It is off until you turn it on, and it is free on every plan.
To turn it off, flip the switch off and type your current PIN.
Forgot it? Tap Forgot your PIN, sign out, and sign back in. Signing in proves it is you and turns the PIN off, so you can set a new one.
Still stuck? Contact us, email support@goaldapp.com, or send us a message from Help & Feedback in the app.