Observed arrival · 2026-09-24
Plumb Bob: an iPhone green reader for golfers
Plumb Bob says it uses an iPhone camera and AR to read a golf green, estimate a putt’s break, and track putting performance.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Golfers who want a measured read on putting greens
- Worth noticing
- For speed, the site says to roll a ball 8–15 feet, then roll it back the other way to cancel slope.
Field notes
The described workflow starts by marking the ball, then walking the line to the cup so the phone can map slope along the putt; a final vertical hold supplies the plumb read. The page says a single 8–15-foot roll estimates green speed, with a reverse-direction roll used to cancel slope. It also presents distance- and slope-based putting stats, but homepage examples are not independently validated results.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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