Joe Maring / Android Authority

What makes a great Android interface? A few things immediately come to mind. It should be fast, reliable, feature-rich, and easy to use. In 2025, just about every option checks these boxes. As Android has matured, finding an outright bad Android UI is virtually impossible.

This means that standing out from the crowd is more difficult than ever. Even so, that’s precisely what OnePlus has managed to do with its latest build of OxygenOS. Since late December, I’ve used a OnePlus 13 with OxygenOS 15 as my daily Android phone. During that time, I’ve been thoroughly impressed with OnePlus’s software.

OxygenOS 15 isn’t drastically different from skins on Google, Samsung, or other Android phones. However, a handful of small yet meaningful decisions have catapulted it to the Android interface I prefer more than anything else. Here’s why.

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Joe Maring / Android Authority

OnePlus makes a big deal about the smoothness and responsiveness of OxygenOS 15. A really, really big deal. A large chunk of the company’s OxygenOS 15 landing page is dedicated to it, talking about how much smaller OxygenOS 15 is compared to OxygenOS 14 (20%, to be exact) and showing multiple animations of apps opening and closing to drive the point home.