Apple was been criticized by its 16GB model, due to the low space we are unable to use the iPhone at the maximum level. So we finally Apple has given permission after so many years of development it permits new iOS 10 users to remove the pre-installed applications on iPhone, iPad and iPod touch.
For example, if you never use the Stocks app, Podcasts or Wallet, you can now simply delete it. Apple strangely did not report this feature at WWDC keynote 2016. Now it is possible to delete default pre-installed apps on iOS 10.
You can remove these applications: Calculator, Calendar, Compass, Contacts, FaceTime, iTunes Store, Mail, Maps, Music, Notes, Podcasts, Comments, Shares Tips, Videos, Dictaphone, Clock and Weather.