Bullseye Ballistics is a long-range ballistic calculator built on one rule: the solver takes no shortcuts. Every term that moves the bullet gets computed, so the answer is as precise as the physics allows. Whether you can shoot the difference is your call, not the solver's.

THE SOLVER
• Full point-mass solver with G1 and G7 drag, in mil or MOA
• Spin drift, aerodynamic jump and Coriolis computed and rolled into the dial
• Muzzle velocity that follows powder temperature, from a table you keep per load
• Transonic and subsonic distances, time of flight, velocity and energy on target
• Stability factor (Sg), with a what-if Stability Calculator
• Latitude and direction of fire from your phone's GPS and compass

LIVE SENSORS, LESS TYPING
Connect several Bluetooth sensors at once and the solution updates in real time. Stale readings are released automatically, so the solution never runs on an old number.
• Calypso Ultrasonic, Portable Mini, Mini All-in-One, Handheld and LoRa wind meters
• Calypso WeatherDot for temperature, pressure and humidity
• WeatherFlow Tempest
• Live Wind: a wind clock showing the last two minutes of swing, with a hold for the High, Average and Low

HIT PROBABILITY
See your hit chance on the target you pick, with a ranked error budget showing what's costing you most: wind, range, velocity, BC or dispersion. Set the wind bracket you're holding for and the card tells you when the live wind matches it.

TRUE IT TO YOUR RIFLE
Two-point truing against your observed dope, or a fit over the misses in your shot log. One tap applies it, and the next solution starts from what your rifle actually did.

LOG EVERY SHOT
Call your shots by voice ("miss, three tenths mil left") or tap a miss grid. Each shot is logged with the solution and conditions at that moment, which builds your hit rate by distance, your miss patterns and your dope by density altitude.

SAGITTA BALLISTICS AI
Built in, and optional. Sagitta compares what the solver predicted, what the wind did, what you called and where the bullet went, then tells you the most likely reason you missed. Ask it about your rifles, loads and shots in plain language.

ALSO INCLUDED
• A gun number for each load, checked against the full solve at every range
• Group measurement from a photo, with confidence intervals
• Charge and seating-depth ladders for load development
• Match import: photograph a stage sheet or upload the whole match book
• Hunting Zero, max point-blank range and Hunt Mode
• Barrel life tracking and cleaning reminders
• Bullseye Ballistics External Display: your solution on a HUD mounted to the rifle

YOUR DATA STAYS YOURS
No ads, no analytics, no tracking. Your data lives on your phone. Sign-in, cloud backup (Premium) and AI are optional, and none of them is required on the range.

Questions or support: info@BullsEyeBallisticsCalculator.com