Achieving higher athletic performance with an iPhone app

A marathon is 26.2 miles, not 23 or so.

Pedometers help you train by tracking precise distance and speed. Some devices estimate by counting steps and lose track when stride length changes. Others use GPS, but are careless with wild data. Roadbud shows accurate speed, distance, and elevation.

• Now your 6:00 pace means you’re flying, not just carrying a broken gadget.

Running log

You get faster when you review progress. But who wants all the fuss of maintaining a running log?

Review your workouts as you get faster and add mileage. No synching to your computer or browsing the web.

• Check out your Roadbud training log as you walk home on your cooldown.

Any running shoes you want

Some gadgets only function with a chip that fits in special running shoes.

• Roadbud performs barefoot or even on a bike.