Don't worry - your data is almost certainly still safe.
This is one of the most common issues users run into, and it's nearly always caused by accidentally logging back in with a different account than the one you originally used.
What typically happens
If you originally signed up with email and password but then logged back in using "Sign in with Apple," Apple creates a private relay email address. Balloon treats this as a brand-new account - which is why everything looks empty.
How to get your data back
Log out of the app (profile icon top left → scroll to bottom → "Log out")
Log back in using the "Continue with email" option with the email address and password you originally used
Once you're signed into your original account, all your data should be right where you left it.
Forgot which email you used?
If you're not sure which email you originally used, or if you've forgotten your password, reach out to us through the in-app chat. We can look up your original account in our system and send a password reset link to that email so you can regain access. Alternatively you can check your email inbox to see at what email we're sending your weekly summary and product updates.