I don't have Auxo so cannot comment on the incompatibility but otherwise iCaughtu pro works well. But i would hope i never have to use this tweak to find my lost iPhone.

Btw one bug i had found with iCaughtu pro was that i had set the word "location" in SMS commands to trigger sending photo and location every 10 minutes to my email ids. I know the word choice is wrong and very common word and i should have kept a different non commonly used word.
But anyways, i assumed that if ever i got a SMS / iMessage with "location", the aforementioned functionality trigger.
But one day out of no where i started receiving emails every 10 minutes. I was not sure what triggered it so i went back to my Messages and found that in one of the conversations i had mentioned to the other person "turn off those location services" and this probably triggered the emails. There was no way to turn this off so i had removed the app for some time. The emails stopped.
After few days i again reinstalled the app and the emails started coming again.
I contacted the developer and he suggested me to modify some data in a file related to the app to stop this and it did work as expected.
From then i have changed the trigger keywords to few uncommon ones.
But i am still surprised since it was a sent message which had the keyword and not a received one.