For me very useful apps is everynote, slack an redit , by the way. Everynotes helps you organize you local lanscape and help you make good notes during your work activities. Slack- you can create various channels for various tasks or various groups of people. It’s great for a lot of things because the chat service can be integrated with a ton of other services such as Asana, Giphy, Google Drive, Twitter, Zendesk, and other productivity tools.
Redit- helps me find advice, tutorials, and information about basically anything. I recommend reading good information here:
https://truowl.com/ about education and posibility to make this process with a lot of fun. Not only mobile apps provide good stuff for you, also and good news platform.