Precision Sports Ai markPrecision Sports Ai
Coming soon

Sub One

Shot Timer

A shot timer for iPhone and Apple Watch. It detects each shot from the recoil at your wrist, so you get splits without carrying a separate timer.

A Shot Caddy sub-brand from Precision Sports Ai, built for action shooters.

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How it works

From the first beep to a corrected count, in six steps.

  1. Apple Watch home screen showing a lit START button for the G17, with Par drill below

    Step 1 · Apple Watch

    Pick your gun

    Choose the firearm on the watch home screen. START is lit, so this gun is calibrated on this watch. The watch works on its own, so the phone can stay in the car.

    Read more in the User Guide →
  2. Apple Watch showing a running time of 1.21 seconds, a shot count and a red STOP button

    Step 2 · Apple Watch

    Time a string

    Tap START, take your start position and hold still. After a random delay the start signal sounds and the clock runs. The screen shows your time and shot count. Tap STOP when you are done.

    Read more in the User Guide →
  3. iPhone result screen for a string: 13.84 seconds, 18 shots, first shot 3.75, best split 0.29, average 0.44, with the shot list below

    Step 3 · iPhone

    See the result

    Total time runs from the start signal to your last detected shot. You also get your first shot, best split and average split, and every shot with its time and split.

    Read more in the User Guide →
  4. iPhone Capture block showing start position, sample rate 800 Hz, start delay, watch hand and wrist, with string actions Hands below waist and Fire 18

    Step 4 · iPhone

    Tag what you did

    The Capture block shows the start position the watch sensed. Leave it if it is right, or tap the correct one. Then build the list of what you did, in order, so you can learn from it later.

    Read more in the User Guide →
  5. iPhone Sessions list showing strings for a G17 with times, shot counts and colored action labels such as Low ready, Slide forward and Fire 5

    Step 5 · iPhone

    Review your sessions

    Every string is listed with its time, shot count and colored action pills. A yellow row means you corrected that string’s count, so it is kept out of your numbers.

    Read more in the User Guide →
  6. iPhone Trace Lab showing the acceleration trace with a lime line for each detected shot, and sliders for peak floor, energy floor, sigma and refractory

    Step 6 · iPhone

    Check the count in Trace Lab

    Trace Lab replays the recorded sensor data through the same detector the watch ran. Each lime line is a shot. Move the sliders to see why a shot was counted or missed, without going back to the range.

    Read more in the User Guide →
Read the full User Guide