Excellent tip to use the phones BT and midi out to the laptop!
My phone is a Sony Xperia X Compact running Oreo.
My laptop an ACER R3-131T-P^YX running Windows10. Using the ASIO driver for optimal latency.
I had severe problems playing via the internal bluetooth adapter of my laptop.
Too much delay, lot of mispositioning (double hits, wrong midi notes).
So what I did now, connected my freedrums to my phone via your browser service. Connected phone via USB to the laptop and enabled midi (actually Android asked if it should make a MIDI connection)
In Reaper the phone shows up and I can play the MTPowerKit with the same accuracy of placement as I have in sensorware. Latency is little better than on my phone I think, very good to be able to play!
Love my FREEDRUM! Now get my footsensors ASAP!