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A record is something that already happened, so the calendar only opens days up to today. Tomorrow becomes tappable tomorrow.

Settings, then Delete my data, then Delete all records. Your account stays and you are not signed out; what goes is everything you have recorded, along with your name, gender and birthday.

Yes — choose Continue as guest when you open the app. Everything works, and what you record stays on this device until you link an account to it.

Yes. Open the profile tab, tap your account card, and link Apple from the Link section. Your records stay with the account you are already using — linking adds a way to sign in rather than starting a new account.

That identity belongs to another DailyTails account, and one identity can only sign in to one of them. Sign in with it directly if that account is yours.

Settings, then Delete my data, then Delete my account. Everything you have recorded and everything in your profile is erased with it, you are signed out on every device, and none of it can be brought back.

Yes. DailyTails is free to download and use, and you do not need an account to start. Some extras, like the extra photo slots on each day, come with the Premium Pass.

Subscriptions are managed by the store you bought it from — the App Store on iPhone, Google Play on Android. Cancelling there stops the next payment and keeps your access until the period you already paid for ends.

Settings, then Language. DailyTails is drawn in English or Simplified Chinese, and the choice takes effect right away.

Settings, then Text size. Choose from seven sizes, or turn on Follow system to match your phone's text size.

Settings, then Start of the week. Pick Monday and the calendar redraws its columns that way.