Dear Jim!
I updated JMT for iPhone/iPad on AppStore to fix the issue you wrote. It takes some time to be reviewed by Apple and and will be available for update, I hope.
Of cause our main goal is J-Field software. JMT is designed as backup software for J-Field and as start-up before you don't have Triumph-LS.
By any case we are going to add VB-RTK feature to JMT for iPhone/iPad as we have done for JMT for Android.
Best regards, Yuri Noyanov.