That also goes for and --Abvio's other apps which offer the same functionality as Runmeter but are geared toward those specific activities. "If you're a runner or walker or cyclist who is visually oriented, you can set up the app to turn the screen display on for a few seconds and view your time, distance, elevation, pace, calories burned, and so on--just about anything you want to know about your workout in progress," Kusmer adds. "It's that simple."

Kusmer says Abvio's is the first fitness app poised to take advantage of iOS 5's Notification Center when the . While he expects other GPS apps to eventually make use of the new feature, he says that Abvio, which has already released the new version in advance of iOS 5, is ahead of other developers because "we focus solely on the iPhone. We're iPhone-centric, while most of our major competitors treat the iPhone and Android phones as data collectors to push data to a Web site."

As a result, says Kusmer, "they really have to program to the least common denominator. They're not looking to take advantage of specific features (of iOS). They're not focused on the leading-edge abilities of the device, and because we focus on the iPhone, we focus on iPhone features."

In this instance, the focus on iOS 5's Notification Center is likely to put Abvio's $5 fitness apps ahead of the pack in terms of both innovation and usability, at least in the immediate aftermath of iOS 5's debut.

And this is what Kusmer works for. "We applaud Apple for making iOS the best mobile phone platform, hands down," he says. "We've tested our applications thoroughly to make sure we're offering best-in-class support for iOS 5. And with support for Notification Center, our customers will have hands-free access to data that will help them monitor their fitness in real time."