Piano is a free Android app developed by DreamGirl Inc. under the category of Multimedia, specifically Music & Radio. This app is perfect for those who are looking to learn or play piano without the need for a physical instrument. You can attach your headphones or speakers and enjoy the experience of playing piano at home, without any cost or space consumption.

With Piano, you have all the keys you need to play any of your favorite songs, including a number key to help you remember the tune. The app has 88+ keys, a slider to focus on your favorite area of the piano, and multi-touch capability for live piano experience. You can even learn to play with the jungle bell tune and show off your skills to your friends. The app also features magic tiny black keys, HD piano tunes, and melodies to help you learn everything you need to know.

Note that if your mobile speaker is not loud enough, it is recommended to use headphones for a better experience. Overall, Piano is a great app for anyone looking to learn or play piano and experience the feeling of playing a physical instrument.