Bulletflight

Note: This is the highest level of BulletFlight (level M, Military). Also see BulletFlt L1 and BulletFlt L2 for lower-cost alternatives.

Knight's Armament BulletFlight is a military-grade ballistic computer that provides quick solutions in the field. BulletFlight does not output information in table format but rather dynamically gives you the solution you need now to make that shot. Current weather conditions including temperature, pressure, humidity, wind speed, and wind direction can be input, as well as angles to the target as measured by the built-in accelerometer. The app then provides highly detailed solutions out to 3000 meters. Your weapon profile includes your scope MOA/mRad per click, and hence when you provide a range to the target, the app will simply show how many clicks you need to change the scope by for that range and wind speed.

Includes over 1400 projectiles including carefully-measured G7 BC database for VLD bullets. BulletFlight's G7 data is courtesy of Bryan Litz and I recommend his book: http://www.appliedballisticsllc.com/index_files/Book.htm

Up to five ballistic coefficients with corresponding velocity thresholds may be used for each profile to enhance accuracy, or use a single G1, G7, or G8 value.

Several built-in profiles for the Army's M110 and M110C semi-automatic precision rifle, the Army's new XM2010 sniper rifle, the 14.5 inch SR16 rifle, The 50 BMG M107, .308 M40A3, .308 M24, and the 6.5mm KAC PDW allow you to get started quickly. You may alter these profiles, or add new ones.

This app is currently in combat use by military snipers in Iraq and Afghanistan.

Features:
Android-specific interface.
Built-in profiles for common military rifles, but easily add more custom profiles.
Accurate bullet database with most major brands.
Works with Kestrel BlueTooth weather meters.
3000 meters range (2000 using simple screen).
Fast and accurate ballistic computation using G1, G7, or G8 ballistic coefficients.
Easy to use interface yet powerful and full featured. All relevant data on screen all at once.
User interface designed to minimize chance of input errors.
"Simple Screen" with distance wheel, but also "Full" screen where any exact range may be used.
Output in inches, cm, MOA, Mils, and scope clicks.
Option for Metric units. In most cases imperial and metric are visible at the same time.
Direct input for scopes with either MOA or mRad metric input (such as Schmidt & Bender).
Calculates 360 degree wind drift using either degree of O'Clock format input.
Wind speed may be specified in either miles-per-hour or meters-per-second.
Advanced atmospheric model.
Uses GPS to locate nearest weather station and then automatically gets weather data and altitude for ballistic computation.
Sight-in weather may be logged and stored for automatic normalization to standard conditions. So you may sight in at any temperature or altitude and later be accurate at any other temperature or altitude.
Built-in accelerometer will detect angle for improved accuracy.
Computes actual BCs from collected data. Some users will do this for each log of ammo before a mission.
Built-in mil-dot range calculator.
Calculates bullet twist / stability with a highly-accurate formula.
Computes bullet spin drift.
Built-in help screen.