No, there is no option for just Bluetooth. You would have to get the Redbear Duo to use bluetooth with carloop. However, when you write your firmware, you can choose a manual-type mode that does not use the WiFi ... a bit more expensive than Bluetooth only but it should function just fine.
If all you want is an OBDII reader tool, then there are lots of blutooth dongles out there that do the job. If you want to do something beyond just that, then carloop is the best option, in my opinion.