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The Story

A game about stillness.

We made an action game where the most important thing is to do nothing — until the exact right moment. Welcome to Cowboy Quick Shot.

Why a Western?

Because the gunfighter's draw is the most cinematic image of human reaction time ever invented. Two people standing in a dusty street, hands hovering, waiting for an invisible cue. Sergio Leone built whole movies around the half-second before the bullet. We wanted to put that moment on iPhone.

What's inside

Cowboy Quick Shot uses Apple's Core Motion API at 100 Hz to detect the instant your phone rotates from holster (barrel down) to fire (horizontal). The signal fires at a random interval. The time between signal and motion is your reaction time, measured to the millisecond.

No machine learning. No cloud calls. No gimmicks. It's a stopwatch that knows when you flinched.

What we believe

  • No ads. Ever. The base game is free and stays free without showing you anything you didn't ask for.
  • No data harvesting. Your motion data, scores, and habits stay on your device. We don't even know how often you play.
  • No dark patterns. No fake countdowns to fake sales. No "limited time offers." You buy the cosmetic, you own the cosmetic.
  • One-time purchase. If you upgrade, it's once, forever, no subscription.

Who's behind it

HarmonyAstroApps is a two-person studio. We've also made Skymap (the AR constellation finder you're probably looking at if you came from the home page) and a few other iOS apps. We answer email personally at harmonyastroapp@gmail.com.

What's next

Audio cues for visually impaired players. Apple Watch companion. A real-world tournament mode for parties. If you have feature requests, we'd love to hear them — same email.


Made in 2025 by two people who watched too much Sergio Leone.