High-Quality UI Texture Atlas for Mobile Devices - Emmanuel Katto Uganda

Hi All, I am Emmanuel Katto. I’m creating a 2D mobile game using Unreal Engine, and I’m having trouble creating a high-quality UI texture atlas that looks great on both iOS and Android devices. How can I create a texture atlas that is high-resolution enough to look great on high-end devices, but also small enough to be efficiently compressed for lower-end devices?

Please let me know.

Thanks!
Emmanuel Katto