Re: Mobile Tracking Device
I find iOS's preemptive calendar journey reminders to be a bit bizarre.
Thankfully they made it so that you can disable it. I appreciate the idea, but, like you, I have found it less than perfect so I tend to do that manually.
The only journey related thing I use is the reminder feature which you can set so it reminds you when you approach or leave a location. Good for things to pick up when you leave work or home or come near a specific shop. That means I must allow it to track me, but that location data is purely local (caveat: as far as I know, of course).