Zero Considerations

Ballistics Calculator & Zero

$9.99 · Designed for iPad. Not verified for macOS.

Photograph your target, get the exact clicks your turret takes. 1,219 optic entries with the makers' click values. No account, no upload. One purchase, no subscription. A ballistics calculator that reads the paper. Photograph your shot group and Zero Considerations gives you the exact clicks your turret takes to move point of impact onto point of aim. Everything that measures and calculates runs on your phone, with no signal. Your firearms, loads, photos and results never leave your device. The one part that uses the internet is the optional weather fill, which sends an approximate location to a weather service and stores nothing. Leave it off and the app never touches the network. SIGHT IN FROM A PHOTO • Shoot your group, photograph the target, and the app finds the target and the holes, measures the group against your point of aim, and gives the exact click adjustments for your turret. • 1,219 optic entries carry the makers' own click values, so the same scope in MOA and in MIL gets the right answer. • Scale comes from a printed target with coded corners that also squares up camera tilt, or from a store-bought target the app recognizes. Type a known span for anything else. A manual fallback always works. • Sighting in indoors? Proxy zero works out where to print at 25 yards so you should be on paper at 100. The app calls a proxy zero a prediction, because that is what it is. • If it is not sure it has your target, it shows you the photo and asks. It will not print a confident call it cannot stand behind. BALLISTICS THAT MATCH YOUR RIFLE • Drop, wind and energy in MOA, MIL or clicks. • Temperature, pressure, humidity and wind fill in from your phone, or type them yourself. • A wind dial you drag to your call, with optional compass capture. • Point-blank range and maximum ordinate. • Zero and true: from a photographed group at a known distance, back out your true muzzle velocity so your dope matches what the rifle actually does. KNOW YOUR OPTIC BEFORE YOU SHOOT • 487 reticle patterns drawn to the makers' published subtension sheets wherever the maker publishes the numbers, to scale, so you can see your real holdovers — and where one never did, the app says so on the reticle. • A suggested zero distance for each reticle, based on your load. • A mount and riser calculator that works out true height over bore from your rail and mount, offset optics included. Bore sight it, then confirm the zero on paper. SET UP YOUR RIGS ONCE • Save firearms, optics, mounts, loads and lasers as setups you reuse. • 852 firearms and 512 factory loads built in, or add your own. • Device loadouts: primary optic, offset, laser and irons on one rifle, each with its own zero. WHAT IT COSTS • One purchase. No subscription, no ads, no analytics, no account. For education and lawful sporting use. Always verify your zero and dope on paper before relying on them.

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176 more Vortex optics, including the Venom 1-6x24: scopes, red dots and prisms, each with Vortex's own click values and a reticle drawn to Vortex's published reticle sheet. Multi-reticle red dots: pick the dot, the circle, or both. Scopes with different elevation and windage clicks now get the right number of windage clicks. A simpler scale step.

The developer, David McCoy, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Provider
    David McCoy
    Size
    193.2 MB
    Category
    Sports
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPad
      Requires iPadOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    13+
    Copyright
    © 2026 David McCoy