SEO investment to reach iPhone users may get a lift thanks to Google's development of a new smartphone app aimed at making search from the devices more intuitive.

Google has rolled out an updated version of its iPhone search app, which boasts a redesign and offers faster results. As it has with other search apps, Google has added autocomplete to its iPhone app to make it more intuitive and simpler for searchers.

The app also makes access to other elements of Google search easier with improved image search and Google Places access. Additionally, users can quickly turn to other Google apps they have on their smartphone with a new Apps button on the main screen of the iPhone Google search app. The enhanced voice recognition that powers the iPhone’s Siri with a voice search tool is now available for Google searches as well. The Google Goggles technology (not to be confused with the upcoming Google Project Glass technology) is similarly accessible from the Google Search homepage.

For marketers, a simpler search experience on the iPhone makes it even more important to ensure users of the world’s most popular smartphone are a part of targeted marketing campaigns. Whether it’s an SEO strategy or a paid search campaign, iPhone users are already a valuable audiences as they frequently search on the device .

Brafton recently reported that mobile search from all smartphone operating systems is on the rise, with iPhone users conducting their fair share of queries. Chitika found that 54 percent of all web activity on the iPhone is dedicated to mobile search, making iPhone search the most common mobile web activity among all of the measured operating systems.

Joe Meloni is Brafton's former Executive News and Content Writer. He studied journalism at the University of Massachusetts, Amherst, and has written for a number of print and web-based publications.