Principles of iOS app design

On seeing the title if you expected to read a big essay, sorry. Here they are:

A well designed iOS app,

  • is consistent in working and looks
  • indicates in each screen where the user is and what he could do
  • has clear and shallow navigation
  • avoid using gestures as much as possible so that the user could understand it by just looking at it
  • is discoverable enough so that the user can learn it by exploring it
  • sticks to conventions as much as possible and overthrows it wherever required
  • has controls that are large enough to be tapped without much effort
  • gives clear feedback to user's actions
  • feels smooth and fast
  • looks professional

In short, a well designed iPhone or iPad app gives a clear picture of its working and makes the user feel on top of it.

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