Following is the list of the best online courses for app development:

• Build your very first iOS App- edX

• Build a simple Android App with Kotlin- Treehouse

• Build your first iOS App in Swift- Skillshare

• Multi-platform Mobile App Development with NativeScript- Coursera

• Associate Android Developer- PluralSight

• Developing Android Apps- Udacity

• Machine Learning for Apps- Alison