Meet golf's newest ball marker.

What is Slopegraide?

Slopegraide is a smart ball marker that connects to your iPhone, iPad, or Apple Watch and reads the green for you in real-time!

What separates Slopegraide from other products on the market is the abundance of valuable data the app provides. Slopegraide shows you not only the slope value and direction, but also where to aim your putts and how soft or firm to hit them!

Mark, pick, read, and putt!

Technology is now available for the putting green.

Our patent pending sensor and mobile app is simple, quick, and easy to use. At the press of a button, Slopegraide gives you a read of your putt in a second or less.

And you don’t need to be tech savvy to use it!

Read putts like the pros!

Learning how to effectively read slope on the greens used to take many hours of instruction and experience on the course, something that was only available to tour players with full-time coaching.

Now it's available to you.

With Slopegraide, you will quickly build trust and confidence in your putting, make more putts, lower your scores, and become an expert at green reading!

*Requires paid in-app subscription

Leave your iPhone in the bag.

The *Slopegraide Apple Watch app provides the quickest way for you to read the green; instantly at the flick of a wrist.

Backed by physics.

With multiple ways to read greens and make putts, Slopegraide complements any green reading technique and putting style.

The Slopegraide app provides support for *multiple putt speeds, uphill and downhill putts, green speeds up to 15 on the Stimpmeter, four different display modes, and so much more!

*Requires paid in-app subscription

*Requires paid in-app subscription

Take your coaching to the next level.

Slopegraide for iPad will help your students, from beginners to touring professionals, understand how a putt will roll for many different scenarios on the green.

Create any putt inside 30 feet with our *interactive visual putt model!

★ ★ ★ ★ ★

"Slopegraide helps you understand your present green reading abilities and enhances what you already know. Give it a try, you will like what you find out!"

Dr. Bob Winters
The Confidence Doctor
Sports Psychologist, Author, Speaker


Why should I buy Slopegraide?

Green reading is an art of the game that requires a lot of practice and experience to master. With Slopegraide, you will quickly build confidence and trust in your green reading skills and be on the fastest path to mastering the art of green reading.

Is Slopegraide legal for tournaments?

No. The Slopegraide app has the ability to show you where to aim putts on the green, which goes against the rules on Equipment in the USGA Rules of Golf. Slopegraide was designed to be used for as a training aid for practice and recreational rounds of golf only.

Is the Slopegraide sensor waterproof?

No. The case of the Slopegraide sensor is water-resistant, however we strongly do NOT recommend using the Slopegraide sensor if it is raining or in extremely wet conditions.

What are the dimensions of the Slopegraide sensor?

The Slopegraide sensor is approximately the size of a poker chip with a diameter of 1.75 inches and a depth of 0.5 inches. The mass of the sensor is lightweight at 20 grams.

What is the battery life of the Slopegraide sensor?

The Slopegraide sensor battery lasts approximately between 6 and 8 hours, or up to two rounds of golf.
It takes 90 minutes or less to fully recharge your sensor.

Do I need a specific iOS or Android device to use the Slopegraide app?

This table here shows a set of minimum and recommend requirements to use the Slopegraide app. While the app does not require a specific iOS or Android device, this may be subject to change as the Slopegraide app evolves with future updates.

NOTE: The Slopegraide Android app is currently under construction. Support for Android smart watches is coming soon!

iPhone iPad Apple Watch Android

iPhone SE (1st gen) or newer

iPad Air 2 or newer

Apple Watch 2 or newer

Bluetooth 4.0 LE or newer

iOS 12.4 or later

iOS 12.4 or later

watchOS 5.0 or later

Android 8.0 or later

3.7" display screen size or larger

iPhone iPad Apple Watch Android

iPhone 11 or newer

iPad (7th gen) or newer

Apple Watch 5 or newer

Bluetooth 5.0 LE or newer

iOS 14.4.2 or later

iOS 14.4.2 or later

watchOS 7.0 or later

Android 9.0 or later

5.5" display screen size or larger

Google Pixel 3,
Samsung Galaxy S8, or newer devices

Does the Slopegraide app require a subscription?

Your experience will be much better with a Slopegraide Premium app subscription.

The free version of the Slopegraide app shows you the slope of the green in slope degrees only.

With a Slopegraide Premium subscription, you will have access to many more features of the Slopegraide app, such as our visual rolling putt model, recommended start lines, displayed slopes in slope percentages, configurable green speed, putt speed, uphill/downhill elevation, using Slopegraide with your Apple Watch, and more!

How much does a premium subscription cost?

There are three different pricing options for a premium subscription in the Slopegraide app:

The first option is a monthly subscription for $9.99 USD per month.

The second option is a yearly subscription for $99.99 USD per year. You will get a 7-day FREE trial when selecting this option.

The third option is a LIFETIME subscription for only $149.99 USD. A lifetime subscription provides unlimited access to all features in the Slopegraide app for LIFE, including Roll Maps, our tournament legal putt speed charts!

Monthly Annual LIFETIME


Unlimited access
to premium




Unlimited access
to ALL features,
plus Roll Maps!


List Price:


Your Price:


Your pre-order of Slopegraide includes the following:

  • One Slopegraide sensor
  • One microUSB charging cable
  • FREE domestic shipping in the United States
  • FREE 90-day in-app subscription to Slopegraide Premium that you can start using today!
    (A promo code for Slopegraide Premium will be emailed to you within 24 hours of your pre-order)

All pre-orders of Slopegraide are estimated to be fulfilled and shipped in early spring of 2022.


★ ★ ★ ★ ★

"Slopegraide is helping me build my knowledge of green reading in a way that I never could without tour-level instruction. It’s clearly paying dividends already. Slopegraide is dramatically improving my putting ability at a competitive level that would otherwise take years to achieve."

Evan Boyer
2020 & 2021 Durham Amateur Champion

★ ★ ★ ★ ★

"This is awesome, very accurate! Great product!"

Mitch Cook
PGA Professional

★ ★ ★ ★ ★

"I had my first chance to use Slopegraide yesterday, and I am very satisfied! Long story short, I love it!"

Paul B.
Mid-Handicap Golfer

★ ★ ★ ★ ★

"I haven't always been a good putter of the ball and I still have much to learn, but with this technology I was amazed at how much more confidently I was able to stroke my putts. With Slopegraide in your arsenal, you will be a force to be reckoned with on the putting surface!"

Isaiah Logue
Professional Golfer

★ ★ ★ ★ ★

"I consider this the Trackman of green reading."

Dalton Deardorff
Enjoy The Walk Podcast

★ ★ ★ ★ ★

"I was reluctant at first, but it helps train my body what it feels like on different slopes. It works and it's pretty dang accurate. Before every round, I practice putting to get my mind and feet on the same track with this device. Then I go play. It's been spot on."

Louis N.
Scratch Golfer

★ ★ ★ ★ ★

"This device is legit. I can't wait to use it more on the course! Everything 15 feet and in was money. And even the longer putts were tracking the whole way!"

Ken Williams
Low-Handicap Golfer


Our Slopegraide Playability Guarantee

We fully stand behind Slopegraide and all of our products.

You can return Slopegraide for any reason and receive a full refund within 30 days of purchase.  

We require that the Slopegraide sensor is returned in its original case with all of its components. Upon receipt, we will inspect the Slopegraide sensor and each component to verify it is in good condition and functional without any scratches, marks, blemishes, or any other damage.

Full refunds will be granted if returns are requested within 30 days of purchase and the sensor and its components are verified to be in working and like new condition.


Jeff Mocini

Competitive Amateur Golfer
Creator of Slopegraide and Roll Maps

As a competitive amateur, it is important to prepare for success on the golf course and have tools that will provide me a unique competitive advantage.

We created Slopegraide to simplify the complex art of green reading and help golfers make more putts and lower their scores.

Our mission is to provide solutions and technologies to help golfers of all backgrounds create self-confidence, trust, and joy in their game.

We are a veteran owned small business based out of Melbourne, Florida.

Every Slopegraide sensor is manufactured and assembled here in the United States of America.

As a pro freedom company, we believe that golf is meant to be enjoyed by all who play this great game. We do not discriminate anyone based on their sex, gender, race, religion, orientation, age, or vaccination status.


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