Yeah you can set it to refresh as often as you like. I use 1 minute which is adequate for my application (by the time I'm out of the car in the driveway the lights are on and the alarm is disarmed). For me a combination of (1) the HE app geolocation, (2) Life360 and (3) wifi connection works 100% of the time. I use simple RM rules to manage all this (as per another post on this forum) because I like to know and understand and have complete control over these presence rules.
[update] In case it helps anyone, here is my approach as posted elsewhere... (there are community apps available too, it's just that I'm a control freak and like to know what's going on)... 
