Danny Chait
All work

Blue Tees Golf · Product Manager · 2025–2026

Rainmaker Launch Monitor

Product management for Blue Tees' first launch monitor, a Doppler radar device tracking 20+ ball and club metrics. Owned the requirements, ran the competitive analysis, commissioned an independent accuracy study, and shipped firmware through the product's first year.

  • Hardware
  • Radar
  • Product Requirements
  • Validation
20+
Ball and club metrics tracked
1,000s
Shots benchmarked against a reference system
Highest
Revenue month in company history at release

The problem

Affordable launch monitors gave up either the accuracy golfers would rely on or the software around the hardware. A connected experience meant jumping several price tiers.

What I did

  • Owned the requirements. Defined the 20+ ball and club metrics the device had to measure and how it connects to the rest of the Blue Tees ecosystem.
  • Ran the competitive analysis to place the feature set and price against the category’s established players.
  • Commissioned an independent accuracy study. Thousands of shots from professional and amateur golfers, each measured simultaneously by Rainmaker and by a camera-based reference system of the $10,000-plus class.
  • Designed that study to be defensible. Same shots, same moment, both skill groups, run externally rather than in-house. A device can hold up at tour swing speeds and fail at amateur ones, so a claim proven on one group proves nothing about the other.
  • Owned the firmware roadmap after launch, prioritising spin tracking alongside battery and display fixes.

Results

  • Ball speed and club speed tracked the reference device closely. Carry distance and shot direction showed strong agreement.
  • Every accuracy claim in marketing traces back to the study, which was re-run against the shipped product rather than treated as a one-off.
  • The release, with the Launch app, drove the highest revenue month in company history.

Now

Running user experience discovery for Rainmaker Pro, a camera-based device for the home simulator market.

Artifacts

Four-stage diagram of the validation study. The sample: professional and amateur golfers, thousands of recorded shots, with a note that a device can hold up at high swing speeds and fail at low ones so both groups had to be included. Measurement: every shot recorded simultaneously by Rainmaker, a Doppler radar device, and by a camera-based professional reference system of the ten-thousand-dollar class treated as ground truth, with the study commissioned externally rather than measured in-house. Comparison: ball speed and club speed showed near-perfect agreement, carry distance and shot direction strong agreement. Outcome: accuracy claims that trace back to the study, a baseline later firmware can be measured against, and validation both before and after launch.
The validation study. Both devices recorded the same shots at the same time, so every comparison is like for like.