A smart pen without a wide range of app support is only as good as a dumb one (maybe worse). Having my own drawing app as a companion would the best scenario to launch the product, because users will enjoy the full potential of the stylus out of the box. However, with limited resource, I would rather develop a good piece of hardware accompanied with an easy to use driver for third party apps developer to add support for my pen. 

Despite I have a very good partner, Water, who has created a wonderful driver for the SonarPen. I still find getting app developers to support my smart stylus is the hardest task of all. 

App developers are usually very busy.  Adding support for a new stylus has very low priority in the task list. What makes the situation worse for a new stylus is some developers pick a stylus to support solely base of its popularity. That mentality put SonarPen in a chicken and egg situation. When there are not enough users, the apps won't support the stylus. And when there is no app support, users won't buy the stylus. That why I am extremely grateful for the trust of the developers of GoodNotes. They believe in SonarPen, an affordable but full featured stylus will success, because many iPad users don't want to spend $99 nor $70 for a smart pen.

I am still looking for more iOS apps to support my stylus. If you are a developer or you know a developer that may support SonarPen. Please contact me.

The following videos show the same hardware running in-house demo and GoodNotes. Quick demo VS. professional.