$2.99 too much.
The sound quality is bad, due to the Bluetooth transmission bandwidth limitation of your device, iPhone 5s topped out at 8.00 kHz, that is way too low for good quality. Basically if your vehicle has Bluetooth, it probably has an aux port, spend the $4-$8 on a cable and enjoy high quality sound.
All that being said, this app does what is says, and will play all device audio through your Bluetooth connection. Thanks
ChaosHowler about
Blue2Car, v1.2