Zero Considerations

Zero Considerations is a fast, private, fully-offline firearm zeroing and ballistics tool for the range. All measurement and ballistics work offline on your phone; the only network use is an optional weather lookup you trigger yourself.

DIAL IN YOUR ZERO • Photograph your target and let the app measure your group, then get exact click adjustments to move point-of-impact to point-of-aim. • "Zero-and-true" loop: from a photographed group at a known distance, back out your true muzzle velocity and BC so your dope matches reality. • Print a target sheet from the app — its coded corner markers set the photo's scale automatically and correct for camera tilt. No printer? Lay a cartridge in the frame as a backup ruler, with a manual fallback that always works.

BALLISTICS THAT MATCH YOUR RIFLE • Full trajectory solver with drop, wind, and energy in MOA, MIL, or clicks. • Auto-fill environment (temperature, pressure, humidity, wind) from your phone's sensors and location, or enter it by hand. • Wind dial you drag to your call; optional compass capture. • Point-blank-range and maximum-ordinate tools.

KNOW YOUR OPTIC • Hundreds of scopes and red dots with faithful, to-scale reticle renderings — see your actual holdovers before you shoot. • Suggested zero distance per reticle, load-aware. • Mount and riser calculator that computes true height-over-bore from your rail and mount, including offset optics.

BUILD YOUR RIGS • Save firearms, optics, mounts, loads, and lasers as reusable setups. • Device loadouts: primary optic, offset, laser, and irons on one rifle, each with its own zero. • Large built-in catalog of firearms, cartridges, factory loads, and optics — or add your own.

PRIVATE BY DESIGN • Works with no internet connection. Your firearms, loads, photos, and results never leave your device. • The only optional network request is weather auto-fill (sends approximate location to a weather service, nothing stored). • No ads. No analytics. No account.

For education and lawful sporting use. Always verify your zero and dope on paper before relying on them.