The Apple Pencil is the best stylus to use to get the full experience of Noteshelf. Unfortunately, the Apple Pencil is supported only on certain iPads.
However, you can use the Sidecar function in the latest Mac OS (Catalina) along with your iPad as a workaround. Follow the below steps to use your Apple Pencil on the mac app :
- Connect your iPad to your Mac.
- Use the sidecar option to use your iPad as a second display device.
- Once connected, select the option to mirror your screen on the iPad.
- Now you can use your Apple Pencil to edit your documents on the Noteshelf mac-app.
Alternately, you can also use the Wacom Design Tablets to connect directly to your Mac and use it on the Noteshelf mac-app.