If you want to keep the Samsung look and feel, is the gold standard. It ports software from newer flagships like the S20 or Note 10 Lite to the S9 series.

By removing Samsung's background bloatware and using lightweight system UIs, these ROMs can significantly improve RAM usage and overall speed.

is stuck on Android 10. Custom ROMs allow you to run .

For those who prefer a clean, "Google Pixel" style experience, is the top choice.