Assume a hypothetical 3DS emulator for KitKat on a 2014 flagship (e.g., Galaxy S5 with 2GB RAM):
RetroArch is a "frontend" that runs multiple emulators (cores). The Citra core used to work on older 32-bit Android versions. 3ds emulator for android 4.4.2
Most 3DS emulators are built for 64-bit (arm64-v8a) architectures. Android 4.4.2 was the peak of the 32-bit era; even if you find a compatible APK, most budget devices from that time lack the raw CPU and GPU power (like a Snapdragon 8-series ) required for playable speeds . Assume a hypothetical 3DS emulator for KitKat on