Email support@neatgoapp.com. Include your account email and, for bugs, your phone model and what you tapped before it went wrong. We answer within two working days.
On the Free plan, yes: it only lived on that phone. On Pro or Max, sign in on the new phone and tap Restore.
Email us from the address on your account. See the Privacy Policy.
Through your App Store or Google Play subscriptions page. The app cannot cancel it for you.