The official user interface (UI) and user experience (UX) guidelines from the manufacturers, links to which you can find below, are a source of inspiration for mobile web and application design. Here, you will find guidelines, samples, tips, and descriptions of common mistakes. Many of the guidelines focus on native application development, but we can apply most parts of them to mobile web design.
To provide the best possible experience on each platform, don’t deliver an iPhone experience to a BlackBerry or Android user. Every platform has its own UI and usability guidelines that every user is expecting from your application. For example, the popular Twitter application TweetDeck has a different user interface and therefore user experience between its iPhone and Android versions, albeit the TweetDeck team aims to provide a similar user experience on both devices. The same can be said between mobile an tablet devices with Reeder and Pulse prime examples on iOS devices.
- UI Guidelines for BlackBerry 6.0 Smartphones or the PDF version (PDF 9.2MB, pp. 109)
- UI Guidelines for BlackBerry 4.x, 5.x Smartphones or the PDF version (PDF 7.4MB, pp. 89)
- BlackBerry Browser Content Design Guidelines (PDF 356KB, pp. 29)
Microsoft (Windows Mobile, Windows Phone 7)
- UI Guidelines for Windows Mobile
- Windows Touch UI Guideline
- UI Design & Interaction Guide for Windows Phone 7 version 2.0 (PDF 11.9MB, pp. 101)
- Nokia Design & User Experience Library
- Symbian^3 UI Style Guidelines (PDF 4.5MB, pp. 105)
- Forum Nokia Design Portal
- Symbian UI Wiki
- Nokia Series 40 UI Style Guide
- Hildon UI Guidelines for Nokia Maemo
Palm/Hewlett Packard (webOS)
If you know of any other examples of UI guidelines for mobile or tablet devices or have any general thoughts, please feel free to add them to the comments.