It has the ballistic software built in. Here is some info from the interwebs:
" It also has optional LiNK iOS and Android wireless connectivity and app support. Like all Kestrel meters, the Kestrel Sportsman is drop-proof, dust-proof, waterproof and able to withstand harsh environments without damage – so it can accompany you to the range or hunt for years to come. A range of carry pouch options makes it even easier to take your Kestrel Sportsman with you.
the Kestrel Sportsman with LiNK and get the power of the Kestrel LiNK Ballistics app for free. Build and manage your gun/bullet profiles and download them to your Kestrel Sportsman before you set out. At the range or match, secure your Kestrel Sportsman to a tripod using the optional Kestrel Vane Mount and use the app to quickly adjust the target range and view the shooting solution and wind rose without leaving your shooting position. It's like having a meteorologist and ballistician standing next to you while you shoot.
LiNK enabled units can also be wirelessly paired with LiNK compatible laser range finders, such as the Bushnell Elite 1 Mile CONX, to seamlessly integrate target data into the ballistic solution for unparalleled speed and accuracy.
In addition to the ballistics solver capabilities, the Kestrel Sportsman is a comprehensive weather meter for measurement and logging of primary environmental conditions: wind speed and direction, temperature, humidity, heat index, pressure and altitude. Paired with the Vane Mount, the Kestrel Elite becomes a compact, easily-deployable weather station. Your data log can be transferred to a mobile device wirelessly with the LiNK wireless communication option and Kestrel LiNK app, or to a PC/MAC with either the wireless USB Kestrel LiNK Dongle or waterproof USB Data Transfer Cable (available separately).
Kestrels have been put to the test in some of the harshest conditions on the planet. U.S. Special Forces, combat weather teams, wildland firefighters, smoke jumpers, Mt. Everest expeditions and auto pit crews are just a few who rely on a Kestrel to provide them with the crucial environmental data they need. Watch any on-screen meteorologist during a hurricane, and you're sure to spot a Kestrel in action. With a Kestrel Sportsman, you can put accurate shooting solutions and environmental measurements in the palm of your hand, anywhere your adventure takes you.
Employs the enhanced Applied Ballistics G1/G7 solver, including Aerodynamic Jump, Spin Drift and Coriolis corrections to achieve accurate long-range shots.
Muzzle Velocity Truing allows for accurate measurement of bullet speed without a chronograph.
LiNK connectivity powered by Bluetooth Smart® provides wireless communication to mobile devices and computers. and integration with LiNK compatible laser range finders for improved speed and accuracy.
Choice of solution units (Mils, MOA, or clicks)- works with any gun or targeting scope
Weather mode offers the full environmental measurements, storage and charting capabilities of the Kestrel 5500 Weather Meter, including wind speed, direction, crosswind, temperature, humidity, pressure and altitude.
Large, hi-res, hi-contrast, graphic display is perfectly readable in the brightest sunlight. Includes both bright white and night-vision-preserving red backlight.
Kestrel LiNK for Ballistics app on iOS and Android provides convenient gun management and backup.
Rugged (drop tested to MIL-STD-810G standards), waterproof (sealed to IP67 standards) and floats.
Protective pouch, neck lanyard and Lithium AA battery included.