Golf Simulator List

Plumb Bob: Golf Green Reader

Simulator Software

iPhone green reader: mark your ball, walk to the cup, and see the putting line, aim point, and break on the grass. Three free reads, then Pro.

Visit website (opens in a new tab)plumbbob.app

About Plumb Bob: Golf Green Reader

Plumb Bob is a free iPhone app that scans a green with the camera. Mark the ball, walk the line to the cup, then hold the phone up behind the ball. It draws the putting line, an aim point, and the break on the grass, and turns uphill or downhill into a plays-like distance. iPad is supported, and Apple Watch can log the round.

Three reads are free. Plumb Bob Pro is $9.99 a month or $59.99 a year and starts with a free week. Measuring green speed is included: roll a ball 8 to 15 feet, or pick Slow, Medium, Fast, or Tour. A demo green works without going to a course, and current releases also track speed on a putting mat. Reads are computed on the phone. Use it for practice, lessons, and friendly rounds. Under Rule 4.3, a device that measures green slope is not allowed in a competition round.

Highlights

  • Camera read: putting line, aim point, and break drawn on the grass
  • Green speed from one roll, or Slow, Medium, Fast, or Tour
  • Strokes-gained putting score against a tour average from the same distance
  • iPhone, iPad, and Apple Watch; reads run on the phone without a course signal
  • Three free reads, then Pro at $9.99/mo or $59.99/yr with a free week

Products & services

  • AR putting line, aim point, and break
  • Green speed from one roll
  • Strokes-gained putting score
  • Apple Watch round logging
  • Plumb Bob Pro subscription

Best for

Golfers who want a phone read of line, aim, and break for practice and friendly rounds, on a course green or a putting mat.

Practical guide

How to use Plumb Bob

Plumb Bob is an iPhone green reader for practice and friendly rounds. It does not replace course-play software on a launch monitor.

What the read shows

Mark the ball, walk to the cup, then hold the phone up. Plumb Bob draws the line, aim point, and break on the grass, plus a plays-like distance. Roll a ball 8 to 15 feet for green speed, or pick Slow, Medium, Fast, or Tour. LiDAR iPhones measure depth; other iPhones use the camera, so scan slowly in good light.

Practice and friendly rounds only

Rule 4.3 does not allow a device that measures or interprets green slope during a competition round. Keep Plumb Bob for practice, lessons, and friendly rounds.

Price and devices

Three reads are free. Pro is $9.99 a month or $59.99 a year, with a free week. The App Store lists iPhone, iPad, and Apple Watch (round logging). There is no PC, projector, or launch-monitor setup.

Before you subscribe

  • Confirm you want a green read, not GSPro or E6 course play
  • iOS 18, iPadOS 18, or watchOS 10, per the App Store
  • Three free reads, then $9.99/mo or $59.99/yr
  • Leave it out of competition rounds (Rule 4.3)
  • Try the demo green or a putting mat before the free week ends

putting · iOS · mobile · green reading · Apple Watch

Questions about Plumb Bob: Golf Green Reader

What is Plumb Bob: Golf Green Reader best for?
Golfers who want a phone read of line, aim, and break for practice and friendly rounds, on a course green or a putting mat.
Where does Plumb Bob: Golf Green Reader operate?
Service area: Worldwide · free on the App Store (iPhone, iPad, Apple Watch).
What does Plumb Bob: Golf Green Reader offer?
Plumb Bob: Golf Green Reader is associated with: AR putting line, aim point, and break; Green speed from one roll; Strokes-gained putting score; Apple Watch round logging; Plumb Bob Pro subscription.

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