Want to learn how to play a guitar? The gTar is a digital guitar for your iPhone that can help. All you have to do is connect your iPhone to it, choose a song with its app, and follow its guidance. This is a digital guitar, so it relies on sensors to detect what you are playing in real time and relays that to your phone. You can also produce sounds of other instruments with the gTar. This instrument has 3 levels of play and comes with a list of songs for you to play. The project is currently being funded on Kickstarter.