I spend some time racing cars on track (amateur level). A lot of people I race with use iOS/android apps to record telemetry in an effort to spot where they could improve. For this use the GPS built into phones/tablets isn't up to the job (refresh rate or accuracy) so an external receiver like in the link below is used. Dual SkyPro GPS Receiver for iPad/Android Tablets (Black/Red, XGPS 160) Which got me thinking, most reviews of the follow me function (any softwares implementation) seem to say it works technically. But isn't quick enough to respond or accurate enough to be of any real use so it just ends up being a bit of a novelty that you play with once or twice. So would a more accurate (and crucially, faster updating) GPS position help things? As the receiver links via Bluetooth i assume there'd be no interference to worry about. I don't have a receiver to try this but any techie people want to weigh in on if it should work and/or be of any benefit? If it all sounds good in theory I'll try to borrow one and do some testing.