Ballistic Calculator

[.284]

Isnipe will also figure out spin drift for an extra buck if you want. I think it's one of the best. Bryan lit is probably better but I'm not sure if it's for iPhones.

 

[notsorichguy]

I have used 10 or 12 different ones on my iphone......

Best one IMHO is Bullet Flight, the expensive one, not the $10 one.......

 

[KDX]

iStrelok is free.