I have Grand Prix Edition so I don't know if Rookie is a good comparison. I also don't know if my running the app in my home, without it being associated with a track is a valid evaluation. Classic Timer is all that shows and the hands do not move when I start it, just like what was happening when I...

I have an iPhone Xr with version 15.6.1. and I'm running your Grand Prix v24.7. On 11-12-2022 I raced at Thompson Raceway, trackID: 2185. I've successfully used the timer at this track on several occasions. This last time I could only get the Classic Timer to open. The "Timer" would not op...

OK, I'll buy that. Thanks. Looking at the list I am confused about which way to go. Wi-fi solution is $120. GoPoint Technology 9105 BT1 is $100. One is slower, while the other uses more battery. Since I am new to this is there a way to compare or quantify what might be lost by one being slower or ga...

I'm new to this. Just purchased Lap Timer Grand Prix which I will use with a GoPro3 Black. I have a two year old Bluetooth OBDII: Mini ELM327 Bluetooth OBD2 OBD-II CAN-BUS Auto Diagnostic Scanner Tool. I have not been able to get my iphone to recognize it. My laptop immediately recognized it. On the...