For limited time, you can receive some big discounts on Retronyms IOS products. Phase84 Synthesizer is a pretty solid sounding Synthesizer with a specific sound character.
Available here: Hook – Live DJ and Mashup Workstation (12.99$ → 5.99$)
Available here: Phase84 Synthesizer (4.99$ → 1.99$)
Check out my video about Phase84 Synthesizer