A free program for Android, by Garage Research Emulators.

Speccy is a free home computer emulator for Android that runs software written for the Sinclair ZX Spectrum home computer. It will run all the programs you have installed on your Android device, as well as many more. You can even run the operating system itself, as well as any other software you wish. The only requirement is that the software is written for the Spectrum and is in the correct format. You will not need to download any other files to run the program.

You will be able to access all of your files and programs in the same way you would on your real computer. You can even use the same software and share it with other people. The only difference is that the software will run on your Android device instead of on your computer.