TrackAddict app for android

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I downloaded and tried TrackAddict.
Dont know if it is accurate or not but it is interesting. It has a drag race mode that starts recording when you launch and stops when you hit 1/4 mile or what you set it to.
I went out to a relatively flat long straight road. the road runs almost due east. The app came back with 26.35 s at 70.2 mph for 1/4 mile. I don't know how accurate the app is? The 1 to 2 shift was about 40 mph and the 2-3 shift was just under 70. I had a stumble at about 50 mph (I think it is a fuel starvation due to fuel heat vapor lock issue like i have at hot idle) but it cleared its self. on the return run same road opposite direction at about 50 the engine kicked and bucked and I let off the gas and it recovered but wasn't happy after that.
I tried the TrackAddict app this morning on my way to work. My time wasn’t to good but I also had to slow down before the end of 1/4 I had a car pulling out of the rest area and it messed up my time. I’m pretty sure I can get into the 15-16s. My car started to bog down at 4000 Rpms, I’m thinking I need to turn down my throttle screw. I’ll have to try it again. Cool App!!!! :-)