Quoted:
Just got this new app, I heard about it here in tx by a buddy who knows them.  The basic app is free, it's a ballistic calculator.  For 14$ you get the ability to create custom range and dope cards on a Google map overlay that ranges target and lists dope change.  It also tells you how far out you can hit a user selected area without adjustments and indicates velocity and ft lb thresholds also set by the user.  And

It works natively with their version of a wind meter or whether station.  I got the weather station, upgraded app shipped to me for 98$ total.  I'm pretty sure it's a kestral killer...  waiting for the rain to stop so I can go shoot.
This was featured in swat magazine a while ago.