Allow me to add the need to first have an up and running room analyzing program in possession so as to be able to see a room's acoustics. Without an operational room analyzing program in one's possession, one is "never" going be able to get the best out of "any" auto-EQ appliance, program or sound meter.
Disclosure, I use a sound meter to personally measure output (calibration), a room analyzing program to see the room's acoustics (find nulls, dips and peaks), and both Anti-Mode and Audyssey, MultEQ XT to get the best out of our well placed and tuned subwoofers. Just saying.
If one is looking for options, my recommendation is to first get a room analyzing program up and running so one can see what's what with what regarding a subwoofer's interaction with a listening room's acoustics. Once a subwoofer is properly integrated into a room's acoustics, then add the EQ appliance/program. See the EQ appliance or AVR program as polish to the overall integration exercise.
Regarding REW working with a particular subwoofer, REW measures the rooms acoustics and the frequency response of a subwoofer's output measured with a pick-up microphone. REW will work with all subwoofers that are activated by any AVR, REW is connected to. REW does not EQ anything but instead, measures a rooms acoustics so you can see what EQ'g needs to be done.
Ex. If one has a Behringer Destroyer, the individual can measure a room's acoustics and based on a recorded frequency sweep provided by REW through their subwoofer, pick an offending frequency range, lower the slider, then easily take a new measurement to see how the change affected the overall acoustics in the room.
Hope the above helps.