IPhone and iPad User interface

IPhone and iPad User interface

The user interface of iOS (iPhone/iPad) is one of the key things of its success.

If you own an iPhone or an iPad you probably know how it’s easy to understand a new app.

A reason is that Apple provide a set of rules and advices on how to design the user interface.

All these rules are compiled in the document Human Interface Guidelines(PDF).

This document is a must-read before starting iPad or iPhone development.

Three examples of advices :

Think twice before you redesign a standard control

An iPhone user is used to native iOS controls such as the title bar, tool bar, etc.

That’s also true for the size of these controls. Each button have the size of a fingerprint, which is the best size for a touch device.


Our instinct requires to feel a feedback in response of our actions. For instance pushing a button will give a feedback to your finger.

This is not possible for a touch device. That’s why your app have to provide a visual feedback each time the user do an action.

Look closer at a UITableView, the bouncing animation when you reach the end is a feedback that there is nothing more.


When we discover something new, we use our previous experiences to guess how to use it.

If you see a button on an object, you know it can be pushed and you know that something will happen.

You can even guess if its a good(gree) or bad(red) thing depending of the color of the button.

If you open the contact app on iPad, you instantaneously understand how it works because it looks like a real contact book.

Be focus

A popular thing is that we can remember seven chumks of information. But recent studies say that we can only remember around 3 or 4 !

The point here is that out brain can handle less that eight information units at a time.

User interface design is really complex and require specific competences to understand how the user think.

At IPSOFACTO we focus on our competences, and we work with great designer to build a unique user experience

Steve Boullianne, Multiple post-graduate degrees, Mind/Body/Spirit enthusiast, & a member of Mensa. Loves Skiing, Scuba, and Food. Steve’s First job out of college was programming satellites for AT&T. Founded IPSOFACTO in 1996, Y2K boom, e-Commerce super success, 2.1 boom. Steve is ready to Mediate high quality for all life, our one planet, and human kindness. Loves to dance and tell jokes. Steve believes that Excellent Communication is key to human success (and failure). Steve has 3 sons who are his STARS. They will carry the world into a brilliant future. Since 1996, Steve has been a volunteer drug and alcoholism counselor in the Bay Area. The power of the Great Spirit is in you. Steve is a good friend to have.