No Watch Required: Wahoo’s Blue HR Strap Tracks Your Heart Rate On Your iPhone [Review]
The Wahoo Blue HR ($79) heart rate strap performs a neat trick: by pairing with your iPhone (4S or 5 only) via Bluetooth, it allows you to transform your favorite iOS device into any of the amazing heart rate monitors available on the App Store today. Even better, it works with all the best cycling and running apps too, so now you can monitor your heart and calories on your rides or runs.
