Made for the Apple ecosystem

KATER ZERRO is built around the iPhone features already useful to you. Apple Health holds the data you permit, a widget keeps the month visible, and Siri and Shortcuts make logging faster.

The integration is practical rather than decorative. The app asks for specific Health permissions, uses familiar system controls and keeps every route tied to the same local drinking record.

Your choices stay in your hands: enable only the health metrics you want, remove access in the Health app anytime, and use the app without creating a separate profile or handing over your history.

The result is an alcohol tracker that feels like part of the iPhone rather than a generic tracker squeezed onto it. The tools are there when useful, and out of the way when not.