You may be right. I've checked how Pebble's ability to reply to text messages works on iOS; apparently, it generally doesn't - they've introduced a limited ability for some users only recently[0]. Since the author (and/or his wife) uses iPhone, I can see now why the Twilio is the default.
Replying to text messages through Pebble works on Android though (and I've also been using Tasker to send regular texts for some time), so Android owners could use this feature. I guess it's time to write that patch :).
EDIT: The author confirmed that it is indeed an iOS issue.
Replying to text messages through Pebble works on Android though (and I've also been using Tasker to send regular texts for some time), so Android owners could use this feature. I guess it's time to write that patch :).
EDIT: The author confirmed that it is indeed an iOS issue.
[0] - https://blog.getpebble.com/2015/11/23/iosreply/