Photo of your situation on the course → exact rule + best strategy. No books, no debates, no waiting. In under 3 seconds.
Try Lazar Free3 free queries · No credit card · No install
Three steps. No friction. Designed to use with your glove on.
Open Lazar and take a photo that includes your ball and the context (water, OB, bunker, obstruction...). No need to know which rule applies.
Gemini Vision interprets the visual situation in real time: identifies the type of obstacle, the lie condition, and the playing zone.
You receive the exact rule (with rule number), your available options, and the best tactical play for that hole. In under 3 seconds.
If it appears in the official USGA/R&A rulebook, Lazar knows it.
| Lazar IA | Rulebook | Ask partners | |
|---|---|---|---|
| Response speed | < 3 seconds | 5-15 minutes | 1-3 minutes |
| Accuracy | High (USGA/R&A) | High if you know where to look | Variable |
| Language | Plain and direct | Technical and dense | Depends on group |
| Strategy included | ✓ Always | ✗ Rule only | ✗ Opinion |
| Needs installation | ✗ PWA | ✗ Paper | ✗ |
| Available on course | ✓ Online | ✓ If you carry the book | ✓ If someone knows |
Based on USGA/R&A
Official 2024 rulebook
Answer in < 3s
No waiting on course
Reviewed by referees
National Referee Course
Yes, as long as you only use Lazar to look up rules and not to get advice about your play. Checking the rulebook during play is allowed. What is prohibited is asking for advice about which club to use or which shot to play.
Lazar requires an internet connection to process images with AI. On courses with good mobile coverage it works without issues. We recommend opening it before going out if signal is weak.
Lazar is trained on the official USGA/R&A rulebook and reviewed by certified referees. For standard situations, accuracy is very high. In exceptional situations, always confirm with the official tournament referee.
No. Lazar is a PWA (Progressive Web App) that works directly from your mobile browser. No installation, no updates. Just open lazar.golf and start.
Ball in penalty area, out of bounds, unplayable, in bunker, in animal hole, fixed obstructions, casual water, ground under repair, incorrect drop, order of play, green rules and much more. Any situation covered by the rules of golf.
No. The rulebook requires knowing what to search for, understanding technical language, and making the decision alone. Lazar interprets your specific visual situation and gives you the direct answer: which rule applies, your options, and the best tactical strategy.
3 free queries so you can see how it works. No card, no installation. Just you, your ball, and the photo.
Try Lazar Free