Learning is always motivating and fun. Share your favourite learning apps! I'm especially interested to hearing about apps that are designed for beginners on the topic.
I have used Coursera for a bit deeper level learning and also Blinkist for quick learning. All in all, books are a good way to learn new things IMO and Blinkist (even though it's a bit cheating using it ;D) is an easy and fast way to go through the books.
Absolutely Duolingo for entry level language learning. Learning complex topics is usually more effective using a learning environment such as Udemy. Also books/papers are really effective even if they donât count as apps.