driveline angle finder app
 

Very nice, that one is getting saved in the car links. I am use to measuring everything with a choke angle gage and doing the math then test driving it and if it shake start over. It is a tuff way to find out you hit the wrong key on you calculator.

I wonder now many people on this form know what a choke angle gage is? No google lol

The vibration app can be very handy also. We had a tool called a reed tachometer. If measured vibration cycles per minute. Once you knew the vibration cycle per minute and you knew the gearing in the car you just had to do the math to figure out what was spinning that fast. Maybe someone will make an app that will allow you to put in make, model and options and it could tell you what was spinning at that suspect RPMs. Heck you could blue tooth to the PCM and have the phone monitor the vibration and tell you about problems starting you can not even feel yet.

Yes, very nice instrument, the choke angle gauge.
Had to teach another student in HS in order to pass the class.

If iPhone has a degreed level, could not simply use arithmetic to find the angle?
In school, you learned the three R's...