ASCII Express lets you load programs into your old Apple II (or any computer with an analog cassette port). You simply use your smart phone (or any computer’s out audio jack) plugged into the audio jack to load it into the system.
They even include a program that will take image files and via a simple basic program, accept the incoming data and then write it to one of the floppy disks – similar to ADTPro. No need for expensive drive emulation hardware.