Enki is an app that I used a lot in the past and I heard solo learn is also a good app for learning on the go.
I would push more for YouTube tutorials though and actual practice on your own.
If you feel out of ideas, there are websites such as hackerrank where you can practice your skills and learn from other people (on hackerrank there is a discussion tab that will teach you more than the actual problem)
Enki is an app that I used a lot in the past and I heard solo learn is also a good app for learning on the go.
I would push more for YouTube tutorials though and actual practice on your own.
If you feel out of ideas, there are websites such as hackerrank where you can practice your skills and learn from other people (on hackerrank there is a discussion tab that will teach you more than the actual problem)
Good luck
Thank you Madalinfasie.