You don't need to pay again to start using the app. In this case, you need to follow the instructions below:
Delete the app.
Install it again using this link or just find the 'Keto Diet App' on the App Store.
Sign in on the very first screen.
Use your email and password.
If that didn't help, please contact us via in-app support chat or by email email@example.com. To contact us via in-app support chat, you need to click the "Support Chat" button in the upper right corner of the Today screen and then click "Send us a message". We will reply to you within a few hours and help you resolve this issue.
If you have any further questions or concerns, please don't hesitate to reach out to us via our support chat or answer to this article. Our team will be happy to assist you in any way we can.