AetherSX2 is a new PlayStation 2 emulator for Android. Currently in a closed alpha, the emulator is free and open-source, providing a free option for PS2 emulation on Android. Early testing shows exciting results in many PS2 titles, which is promising for the future of PS2 emulation on Android.
https://www.notebookcheck.net/A-new-free-and-open-source-PlayStation-2-emulator-for-Android-may-be-the-best-option-for-playing-PS2-games-on-the-go.580407.0.html