Theme fusion PS XPERIA is a free personalization app designed by notappss for Android devices. This app is a theme for Xperia phones with the customization of PlayStation. The app features a navigation bar with the symbols of PlayStation buttons, where the home button would cover O X. This theme is optimized for Marshmallow.

However, it is highly recommended to use Xperia Home Beta to get the best experience. Devices C4, C5, M5 do not apply navigation bar buttons. If you want a complete customization, you need to update them to Android 6.

The app also includes a link to the developer's website where you can buy more themes or even request a custom one. It's important to note that the review does not endorse or recommend any purchase from the developer.