Dedicated to jailbroken devices, those apps enhance any iOS device:
- roqyBT: adds support for external bluetooth GPS antenna, HRM (heart rate monitor) belts and OBD (on board diagnostic for cars) keys.
- roqyUSB: adds true USB mass storage. Turns your iPhone into a USB key.
Learn more at www.roqy-bluetooth.net !
Those apps are only available on Cydia, the apps store for jailbroken devices as Apple would never allow my apps on the AppleStore.