Keep doing the magic you have and you will be great. :)
I enjoy the ap and keep retrying it to see if there had been any upgrade. My problem is that the default notification sound is not loud enough in a noisy environment and - despite previous requests to OST - I have no idea as to how I can allocate a specific notification sound to the ap, as I can with the Samsung 'Messages'. Hence I wind up deleting OST and go back to using the Samsung default. I am using a Samsung Galaxy S8 Plus. If you can come up with an answer to my issue, I'll happily use OST out of preference.