Nothing better than JBM
Ive used JBM for years as an online tool. The ability to have this in the field and make real time adjustments is amazing. I credit JBMs trajectory cards with two moose at over 500 yards with heavy crosswinds both times. If you want to become a better marksman, this is the app to buy.
RBPHunter about
Ballistic: Advanced Edition, v6.2.1