I use this app to capture my whiteboard drawings all the time. Its got a great balance of capture and editing features. I can write on my whiteboard, and then tweak the images later on.
Apple Pencil support is great for this app. It also supports all of the latest iOS features ... Except for iCloud Drive. I cant take my drawings and store them in iCloud Drive or other storage providers. I hope they add this in.
ajay.ganapathy about Carbo › Pencil Notes & Drawing, v1.2.3