Lap Timing

My mate uses race chrono on his iPhone and doesn't need the receiver. I have used it in the past on a cheap android phone with the GPS receiver you have shown and it worked perfectly.

 

Get a starline gps one if you can

 

I have used this for years, and its very accuarte and cheap for jus knowing a lap time,
https://www.infinitymotorcycles.com...MIgqW70J7C3QIVC5ztCh1RPAqmEAQYASABEgKQzfD_BwE

However a friend of mine I met doing trackdays has been working on this app the graphics and telemetry is awesome and very detailed, you can overlap you laps and see braking speeds etc and the overlap them with faster people to see the areas of improvement

http://trackdaygenius.com/

 

The problem with Phone GPS is it only refreshes once per second, which although doesn't sound like much, will mean it throws up all sorts of weird numbers and traces - Although will be accurate occasionally.
If you are going to use a phone, please please please don't have it in your inside pocket as I've seen the result of someone crashing with one in their pocket, and the sharp bits of metal and glass made a right mess, and the chap nearly bled to death on the side of the track

 

The telemetry doesn't work from the mobile, its its a gps transponder on the bike and can link up with multiple go pros and then can be played back by an app or computer i haven't looked into it completely but i sure thats how it works

 

I use an aim solo, really interesting telemetry knows where you are on what track, loads of gizmos to play with throttle position split times on the lap etc etc