thaapasa/beerclock ? reverse-engineered prompt

Build me a simple mobile app called Beer Clock for Android and iPhone that helps people track how much alcohol they have had and gives an estimate of their blood alcohol concentration. I want a clean main screen where I can add drinks, see my current estimated BAC, and get an idea of how long it might take to clear out the alcohol.

It should also have a drink details screen and a statistics screen like in the screenshots, with a nice modern look and easy to use controls. Save the drink history locally so the data stays on the device.

Please make it work on both Android and iOS, and use a shared codebase where possible. Keep the app focused on estimation only, and include a clear note that it is not a medical or exact measuring tool. If you need to check current setup or docs online, go ahead.