In 2018, the SonarPen debuted as a cheaper alternative to the Apple Pencil by using audio signals transmitted to the iPad over a cable instead of Bluetooth. Its creators are back with an upgraded USB-C version that introduces additional functionality, including tilt detection and an improved tip that now closely resembles the Apple Pencil’s.
The SonarPen 2 is currently available for preorder through a Kickstarter crowdfunding campaign...