Considered the direct successor to NullDC/Reicast. It is completely free , open-source, and offers high compatibility for Dreamcast and NAOMI games.
: This is the most active and compatible Dreamcast emulator. You can find official builds on the Flycast GitHub page : You can use the Flycast core within the nulldc apk android link
Since nullDC for Android is outdated, the community has largely moved to these more capable emulators: Considered the direct successor to NullDC/Reicast
Open Redream, point it to your folder of games, and tap the cover art. Most games run flawlessly at 2x-3x original resolution. nulldc apk android link
It is safe, updated regularly, and requires no BIOS files for most games.