Photograph your target, get the exact clicks for your optic — then confirm with a group. 301 reticles drawn to published subtensions. One purchase, no subscription.
Zero Considerations is a ballistics calculator that closes the loop. Get your drops, drift and holdovers for any load — then photograph your target at the range and get the exact scope clicks to move point of impact to point of aim. 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 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.
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A much bigger catalog, and every scope entry now carries its own turret.
• 1,043 optic entries. Each reticle version of a scope is its own entry, with that version's exact click value taken from the manufacturer — so the clicks you are told to dial are the clicks your turret actually takes.
• Reticles drawn to the manufacturers' own subtension sheets, so the holdovers you see match the glass you are looking through.
• 852 firearms, with barrel length, twist and sight height.
• More rails recognised, so height over bore is right without measuring it yourself.
• Still no account, no upload, and no signal needed.
Version 1.7
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, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
David McCoy
Size
196.7 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.