iSequence is a beat making app for your iPad. It has an 8-track sequencer, on board effects, and 160 instruments to choose from. Instruments range from a collection of acoustic kits to leads, pads, and more. You can also expand your sound library via the app store with additional sound sets for $1.99. Available effects include Filter, Reverb, Flanger, Delay, Ring Modulator, Equalizer, LO-FI crusher, live looper, Distortion.
iSequence is a music workstation for you iPad. The program gives you 8 tracks to work with (but you can layer multiple sounds on 1 track), 160 virtual instruments, a mixer with effects and automation capabilities, a sampler, and a step sequencer – not bad for $14.99.