I got a new job! I'll need new apps.

Before I had a desk job.. With lots of down time my phone has always been used in that type of environment... Lots of emails, checking using Google, Salesforce... Standard buisness apps and games that I can play in downtime like clash of clans and browse reddit.

My new job I'll be on the move constantly and have very little downtime. What types of apps do people on the move use? I assume I won't use it as much since I won't have a need to but just out of curiosity because I know there has to be apps I don't know about that apply to a on the move life style I've never had before.