Mimo is a free-to-try educational app aimed at teaching people how to write computer code. This valuable skill may seem beyond reach but Mimo includes features for absolute beginners making it very popular. Lessons are split into bite-size portions that are supported by images and interactive practise. You can learn HTML CSS C++ Python SQL and even hacking through this app with more courses promised in the future. The small lesson size makes it ideal for learning in spare moments and the interface is very modern and bright.