Magmo is a call recorder that magnetically attaches to the back of your smartphone. The device works with iPhones but is also available for other phones by using a magnetic ring. After attaching Magmo to the back of your phone, it allows the user to record any phone call by flipping the switch on the front of the device. To start recording, simply flip the switch up and to end the recording, flip the switch back down. The audio files then get automatically saved onto the device and the user is able to download the files onto their laptop. Magmo uses a sensor called Piezo to capture the vibrations that are transferred through your phone instead of using the classic microphone. By doing so, Magmo can more actually record the call and suppress surrounding noise. On a full charge, the device can last up to 7 hours with daily use and can hold up to 32GB of data.