Choose your favorite familiar blank cassette tape look, then pick songs from your device's library to include in the mix. Skip to the next song or listen to a previous track by tapping on one of the tape's turning spindles. Move on to a different mixtape by swiping through your cassette collection. AirCassette even supports Apple's AirPlay to listen to music via wireless speakers, which is way more than I remember my mixtapes doing.
I miss all the quirky tricks of creating a perfect mixtape: timing the perfect pause between songs, watching the tape spin in the player, and deciding which songs are more of an "A Side" fit. Granted, this can still be re-created if I try, but with the new iPhone AirCassette app ($2) I get the look of a cassette with all the re-imagined fun of the digital age.