The document discusses important considerations for designing user interfaces for mobile applications. It notes that user interface design is a major factor in an app's success and budgets 40% for UI design. Good UI design provides clarity, follows platform standards, accounts for expert and novice users, places interactive elements where thumbs can easily access, and limits the number of buttons to avoid overload. Button size should be large enough to easily press and the flow direction should consider handedness.

1. USER INTERFACES FOR MOBILE
APPLICATIONS
K Senthil Kumar
Assistant Professor,
Sri Eshwar College of Engineering,
Coimbatore – 641 202

2. USER INTERFACES FOR MOBILE APPLICATIONS
 Which Interface you like to use?
Interface 1 Interface 2

3. USER INTERFACES FOR MOBILE APPLICATIONS
 User Interface plays important role in deciding the
success of the app.
 The main goal of any app designer should be
making app a daily habit.
 40% of app budget is allocated to user interface
design.
 The common mistakes of designing user interface
are placing buttons smaller in size, placing big or
small images in different places and selecting
wrong color patterns for views.
 Clarity of interface is much required for any app.
 User interface should follow standard native app
interface standards.

4. IMPORTANT CONSIDERATION FOR USER INTERFACE
 Expert vs novice users
 App should be efficient for expert user and it should
provide information to novice users

5. IMPORTANT CONSIDERATION FOR USER INTERFACE
 Ideal button size
 The button size of app should be easily used by user, if
size is less then 1 cm then it is not used by user.

6. IMPORTANT CONSIDERATION FOR USER INTERFACE
 UI Location
 Most UI Elements are placed at bottom or placed at top.
 Most users hold phone and use thumb as primary finger
for touching.
 If user is right handed thumb will easily access the
bottom right of screen.
 If user is left handed thumb will easily
 Access the bottom left of screen

7. IMPORTANT CONSIDERATION FOR USER INTERFACE
 Accounting for motion
 Flow direction plays important role in designing mobile app.
 For example, for a right-handed person, circular flows with a
pivot point at the bottom right of the screen are much easier
than linear flows

8. IMPORTANT CONSIDERATION FOR USER INTERFACE
 How much is too much
 The button should be limited, if we place more no of
button then it will be tough even for expert user