To get the absolute best performance, highest resolution, and graphical fidelity on your Android device, you should use (either standalone or via the RetroArch frontend). Here is how to set it up for maximum quality: 1. Secure the Right Files
Enable this option to stretch the traditional 4:3 aspect ratio into a modern 16:9 view (note: some games may experience minor visual bugs at the screen edges). Important Evolution: From nullDC to Reicast and Flycast nulldc apk android extra quality
Fixes for specific "heavy" games like Shenmue or Skies of Arcadia . To get the absolute best performance, highest resolution,