What are currently the most needed mobile app?

What is currently most needed mobile application?

  1. Gaming
  2. Google play store
  3. browsing
  4. whatsapp
  5. Wats app
  6. age
  7. Hello money
  8. What is currently most needed mobile application?
  9. calendar, waze, alarm, emails, dropbox--- how did I get this invitation? I only just opened an account to test the program. Don't know or who is md28?
  10. I don't know