I just wanted to share a great new app that I use often on my iPad.
It is called Jot! developed by the company Tabula Rasa.
You can very easily make sketches and diagrams. You can also add text to your diagrams using the onscreen keyboard.
You can share your jots by emailing them or you can save them as photos. If you email them to another person, that person can then take the jot and add their own edits.
There is a free version so it's really easy to test it out without cost. If you like it and purchase the full version, you can then save multiple jot files.I tried the free version and loved it so much that I purchased the full version for $7.99. The app is not only fun to use but incredibly useful if you need to easily sketch ideas or quickly take notes.