In this mini series I’m doing, I’ll be going over some useful tips on how to…

There's a brand new API Apple introduced that most people building apps still don't know about. Shoutout to Cole for giving me this idea to talk about. It's called Corner Concentricity, and it's part of Apple's Human Interface Guidelines, Apple's entire design rulebook. Specifically, it comes out of the new iOS 26 Liquid Glass redesign.

The actual API is called Concentric Rectangle, and it makes rounded corners on nested elements, like a button inside a card, automatically match up and curve around the same center point instead of you guessing random corner radius numbers that never quite look right together. It even adjusts live as things resize. Honestly, I'm going to be adding this to clean

plate myself, since right now my corners are just hardcoded numbers that don't really relate to each other at all. I'm doing a mini-series of tips to improve your app's UI and UX. This is day 3 of 5. Follow along to find out the other two.

This is day 3 of 5. Follow along to find out the other two.