Answer by Upasana Sharma:
Here are my favorite apps that I use directly or via their service to keep myself up-to-date!
- (great app if you are interested in learning new languages)
- (if you want to brush up your mathematical skills, it has problems from easy level to advanced level. I am still learning 🙂 )
- (I prefer reading ebooks, hence I sync them on kindle app on Android device)
- (you never know when you might need them, I use them in sync with Duolingo)
- (again its all about what content you are following)
- (if you are interested in market updates, this is a good one)