Project, SonarPen - earphone >> smart pen
Thoughts about a stylus for iPhone? : r/iphone
SonarPen is a $30 iPad stylus that connects to the headphone jack - The Verge
What is the best suited stylus for Tab A7 for precise writing? - Quora
Can I use a stylus pen with a classical (non-touchscreen) laptop computer for note taking and sketching? - Quora
AmberVec Pencil for iPad Air 5th & iPad 9th Gen, Alternative for Apple Pencil 2nd Generation, Stylus Pen for iPad 2018-2022: Air 5th/4th/ 3rd, i Pad Pro 11/12.9, Lapiz para iPad 6/7/8/9th
SonarPen users
The best stylus pens of 2024
This $30 iPad stylus senses pressure via headphone jack