Zero Helper: Rifle Scope Zero

Zero Helper takes the guesswork out of zeroing a rifle, carbine or air gun.

Choose your zero
• Tell it how you shoot (close range, general purpose or precision) and it recommends zero distances for your velocity and sight height
• Compare where each zero peaks and where it comes back on target

See the whole trajectory
• A chart of your point of impact from the muzzle out to 1,000 yards, with near and far zero marked
• A table of drop at common distances
• Real air drag from your bullet's G1 or G7 ballistic coefficient, temperature and altitude
• Elevation and wind holds in MOA or MIL at every distance, and a range card to print
• Show my work: every step of the calculation, so you can check it

Dial it in
• Measure how far your group landed from the aim point, and the click calculator says how many clicks to turn, up or down, left or right
• MOA and MIL turrets, any click value, in yards and inches or meters and centimeters

Print true-scale targets
• MOA and MIL grid targets for Letter, A4 and 24×36 posters, sized for the distance you shoot
• Bullseye rings, crosshair and size check bars, with your rifle's details printed on it

Keep a log
• Save each rifle with its caliber, velocity, optic and units
• Log range sessions, maintenance and zero changes for each rifle, plus a journal for range days
• Export a backup and import it on another device

Yards or meters, inches, centimeters or millimeters, feet or meters per second: pick your units for the app or for each rifle.

Everything stays on your device. There's no account and no ads.

Trajectory figures are estimates. Always confirm your zero with live fire, and follow your range's safety rules.