“…The operating system that underlies Android is a license under the GNU, General Public License Version 2 (GPLv2) which is commonly known as Copyleft. The term copyleft is a license that any repairs by third parties must continue to fall under the license terms(Fatoni & Rendra, 2014) c. The microphone functions as a transducer, which can convert human sound waves into electrical signals(Aulia, Lifwarda, & Yustini, 2018). A smartphone is the development of a mobile phone that is added with features such as personal computer features such as email, personal organizer, and additional connectivity such as wifi and Bluetooth that can be installed on the device (Warangkiran, Kaunang, Lumenta, & St, 2014)…”