SK-51

Its a great App for recording musical tones + your voice and drum beats with it.
Full version have more features but you can enjoy Free version as well,

Free version features:

• Instruments (Flute, Piano, Trumpet)
• 7 Drums kit
• 4 sampling slots
• Full mixer

and much more, however the Paid Version have more features as it has 19 instruments to play with.
Its great App for Music lovers, to practice and create new tones