infoarch. gestures&icon readings. 5 points.

1. As much as possible, keep the gestures consistent with those supported by the iOS. Inconsistent gestures can lead to frustration, confusion, and usability problems.
2. Custom gestures are generally not appropriate for Productivity and Utility applications. most tasks within these applications can be done with gestures supported by the iOS.
3. Icons should be perceived effortlessly; users should not have to pause and interpret them.
4. Icons should be a cohesive whole, and labels should be clear. If abreviated, make sure the targeted users understand them.
5. Always use icons in the tabs, keep labels concise in Title Case. Custom toolbar and navigation icons should not conflict with standard icons.