John from Tour Tempo Demonstrates the String Theory Putter

With just a short period of practice, you’ll develop a smoother, more consistent stroke — the kind that helps you sink more putts and lower your scores on the course.

How/ why it works

This training aid replicates the feel of swinging a weight on a string — the purest form of a winning putting stroke.

Any flaw in your motion — from path and tempo to alignment — is instantly amplified, giving you real-time, actionable feedback on your putt.

Training with this builds muscle memory that naturally improves your stroke when using your regular putter, helping you consistently hit the ball straighter.

*The String Theory Putter will NOT alter your own Natural Tempo

Testimonials

Leo TabickOwner of The Golf Performance Academy

"I was quite impressed the first time I tried this product. This gives you immediate access and feedback in creating the rhythm of a pure swing that every golfer should strive for."

J Michael R.Verified Customer

"My son and I looked at your product at the PGA show. I just got this product in the mail and it's the best putting device I've ever used! Just wanted to let you know, thank you!"

Eric T. V.Verified Customer

"Best putting season I've had in a long time. It helped my take away. I was forward pressing previously, and this helped me be mindful of that."

Gary BattersbyTeacher and Owner of Battersby Golf, Inc.

"It came in time perfectly for one of my lessons, and it worked perfectly. Students saw marked improvement in just one or two sessions. This product is just right!"

Benefits

Immediate Stroke Feedback

Immediate Stroke Feedback

Errors in arc, path, or face angle are exposed immediately—so you can adjust on the spot.
Rhythm Builds Consistency

Rhythm Builds Consistency

Forces a pendulum-style stroke that helps stabilize timing and tempo—crucial for repeatable putting.
Compatible with All Putters

Compatible with All Putters

Builds muscle memory that applies to any putter or stroke style.
Portable & No Setup Needed

Portable & No Setup Needed

No courses, mats, or programming—practice anywhere, anytime without fuss.

Who it's for

High Handicaps: Build solid tempo and face path awareness.

Mid Handicaps: Turn inconsistent putting days into steady, confident performances.

Low Handicaps: Refine micro-improvements in your stroke mechanics.

Coaches & Club Fitters: Get instant feedback to improve coaching or fitting sessions.

If you’re serious about improving your putting, try the String Theory Training Aid and feel the difference in every stroke.

Improve your putting with a training aid trusted by top players!

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FAQs

How to best maximize your short game
  • Stand naturally with the handle held at a similar angle to that of your normal putter. This will mean that you will be standing closer to the ball when using the String Theory Putter, but just return to your normal stance when using your regular putter.
  • Don’t hold the shaft straight down in an unnatural fashion. Allow the shaft to bend at the address to create a comfortable starting position.
  • Start with short putts. The String Theory Putter’s primary intended use is for putts within 10 feet.
  • With practice, this feel will translate into all putts and gradually into the rest of your game.
  • Convenience: The String Theory Putter is fun and easy to use, unlike many complex, cumbersome training aids out on the market. You can easily take The String Theory Putter with you in your golf bag, anywhere you go. You can use it out on the practice green, at home, or in your office. 
  • This product is intended for putting practice, ONLY. It is NOT intended to be used for exceptionally long putts, longer shots, or full swings. We are not responsible for any injury caused by improper use of the String Theory Putter.
  • The String Theory Putter requires the user to make a perfect swinging motion with the putter head. Any errant motion will be immediately detected. For some, it may be difficult to use at first, but like riding a bike, once you’ve got it, you can easily repeat it. Don’t give up!
  • The String Theory Putter is designed for the sole purpose of giving the user the key to the golf swing, and that is a rhythmic swinging motion exclusively using centrifugal force. However, it might not necessarily cure all other putting issues, such as alignment and green reading. Though with consistent practice, your speed control WILL dramatically improve. 

Yes, no special surface required.

Yes, universal compatibility.

Intended as training aid only—not for tournament play.

Consistency in feedback means repeatable strokes and better muscle memory.