This is a brilliant interactive whiteboard app that you can use to explain concepts or makes videos of your learning. If you are someone who forgets things easily, this app can help you create some mini-projects that can be saved as videos, or even quizzes to reinforce your knowledge and undestanding.
You can collaborate easily and even share with friends, publishing directly to Youtube and other Social Media platforms. And it's totally free! (Please note that there are purchase options within the app)
Make a test project, and keep going back to it to test the range of features available on the app.