ZXdroid is a ZX Spectrum emulator for Android platform based on FUSE (the Free Unix Spectrum Emulator).

Features:

Accurate Spectrum 16K, 48K, 128K, +2, +2A and +3 emulation.
Working +3e, SE, TC2048, TC2068, TS2068, Pentagon 128, Pentagon 512,
Pentagon 1024 and Scorpion ZS 256 emulation.
Runs at true Speccy speed on any device you’re likely to try it on.
Support for loading from .tzx files, including accelerated loading.
Ability to load dozen tape, snapshot, disk & cartridge formats, zip archived also.
Saving current emulator state to .sna files.
Hight quality 48K and AY-8192 sound.
Automatic scaling on lager screens with anti-aliasing.
Keyboard, kempston, cursor, sinclair I/II onscreen controls.
Definable hardware keys.
Portrait and landscape orientations supported for better control.

News source: https://slideme.org/application/zxdroid

http://zxdroid.drodin.com/