Meet your new personal putting trainer.

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 tools and valuable data the app provides. Slopegraide shows you not only the slope value and direction, but also trains every element of great putting, from reading greens to speed control to visualization.

*Requires paid in-app subscription

Visualize the break and speed with ease.

Our NEW 3D Putt Model helps you line up any putt in augmented reality, giving you a clear visual of how much your putts will break and the optimal rolling speed.

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 recommended start lines both in Imperial and Metric units for over 200,000 unique putts up to 30 feet based on green speed, slope elevation, holing speed preference, and so much more!

*Requires paid in-app subscription

*Requires paid in-app subscription

Take your putting to the next level.

Our interactive visual putting stroke model (life-sized for iPad) will help you get your putting tempo just right so you can roll more putts at holing speed and start gaining strokes!

Leave your iPhone in the bag.

Our standalone Apple Watch app provides the quickest way for you to get a read; instantly at the flick of a wrist.

*Requires paid in-app subscription

★ ★ ★ ★ ★

"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



★ ★ ★ ★ ★

"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 product is amazing. So simple to use and it really improves your putting. I shot 5-under yesterday including making a 40 footer. The low scores were from sinking critical birdie putts. It's great to see how I can learn how to read putts better from seeing what I am missing."

Colby D.
Scratch Golfer

★ ★ ★ ★ ★

"So far I am really liking everything. I can tell already that strokes are going to fall off my scorecard. I am now dropping more 20 footers that I normally wouldn't make. All I can say is wow!"

Don S.
Mid-Handicap Golfer

★ ★ ★ ★ ★

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

Mitch Cook
PGA Professional

★ ★ ★ ★ ★

"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 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

★ ★ ★ ★ ★

"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


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.

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 30 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.

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.

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

The table below shows a set of minimum and recommend requirements to use the Slopegraide app. While the Slopegraide app itself does not require a specific iOS or Android device, our new and improved Slopegraide AR green reading feature requires one of the following iPhones or iPad Pro devices:

iPhone 12 Pro
iPhone 12 Pro Max
iPhone 13 Pro
iPhone 13 Pro Max
iPhone 14 Pro
iPhone 14 Pro Max
iPad Pro (2020 and newer)

NOTE: If you have one of these iOS devices, then you do not need to purchase a Slopegraide smart ball marker, as Slopegraide AR provides the ability to read greens with the device's LiDAR scanner.

iPhone iPad Apple Watch

iPhone SE (2nd gen) or newer

iPad Air 2 or newer

Apple Watch 3 or newer

iOS 16.0 or later

iOS 16.0 or later

watchOS 8.4 or later

iPhone iPad Apple Watch

iPhone 14 Pro or newer

iPad Pro (2020 or newer)

Apple Watch 8 or newer

iOS 16.5 or later

iPadOS 16.5 or later

watchOS 9.0 or later

Is there a Slopegraide Android app?

We have temporarily discontinued support for Android devices at this time. We are working towards bringing a similar app experience to Android in the future.

Does the Slopegraide app require a subscription?

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

The free version of the Slopegraide app only provides access to the Classic Mode feature and only shows you the slope direction and slope value in slope degrees and slope percentage.

With a Slopegraide Premium subscription, you will have access to all the premium tools and features of the Slopegraide app, such as our new 3D putt model, recommended start lines, configurable green speed, uphill/downhill elevation support, access to our standalone Apple Watch app, our visual putting stroke model, and our NEW game-changing virtual ball rolling simulator, Course Mode!

How much does a Slopegraide Premium subscription cost?

We offer an annual subscription for $99.99 USD per year. New users will get a 7-day FREE trial.



*Includes 7-day FREE trial

Why should I purchase a Slopegraide smart ball marker or Slopegraide Premium subscription?

Green reading is an art of the game that used to require years of practice, experience, and tour-level instruction to master.

With Slopegraide, you will be on the fastest path to learning and mastering the art of green reading and visualizing putts on the greens.

We guarantee that you will gain control, confidence, and trust in your putting in a short amount of time.


Our Slopegraide Playability Guarantee

We fully stand behind Slopegraide and all of our products.

You can return the Slopegraide smart ball marker for any reason and receive a partial refund within 14 days of your delivery date.

All refunds are subject to a 15% restocking fee.

We require that the Slopegraide smart ball marker 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.

Refunds (after applying the restocking fee) will be granted if returns are requested within 14 days of your delivery date and the sensor and its components are verified to be in working and like new condition.

Slopegraide Premium app subscription purchases are non-refundable.


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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