Google on Thursday started offering Google Instant on some Android devices and iPhones, as promised when it launched the service for computer users in September.

Google Instant displays results as users type, rather than waiting for the user to hit the search button.

While conceptually the service could save time for mobile users just like it does for computer users, it's not quite as useful on phones due to screen size.

For instance, when using Instant search on an iPhone, the keyboard covers half the screen, and three lines of predicted suggestions under the search bar take up additional screen real estate. That leaves a small sliver of screen -- enough to display three lines of text -- for search results. In some cases, those three lines are part of a sponsored advertisement.

More: http://www.computerworld.com/s/article/9195022/