For bugs or requests, email penkichi.dev@gmail.com.
How do I invite friends?
Share your invite code from Settings → Invite. Your friend enters the code on the start screen to request to join, and they join once you approve (up to 4 people).
I can't press the wake-up button
The button is disabled once the grace period after your goal time has passed. If you forgot to record yesterday, you can do it the next day.
How do I delete my account?
Settings → Delete account. You will be asked to sign in again to confirm.