As one of its daily deals, Groupon offers the ION Audio All-Star Guitar Controller for Apple iPad, iPhone 4/4S, or iPod touch for $32.99 with free shipping. That's the lowest total price we could find by $25. Sales tax is added where applicable. This full-size electronic guitar includes a fitted holder for the iPad, iPhone, and iPod touch, allowing you to digitally replicate strumming and shredding using free the All-Star Guitar app. Deal ends March 30.