Everyday 20% Discounts for AirWayz Club Pass Members


The Stack System

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Train smarter with the Stack System and increase your speed and yards following the training plan customized for you.

- 5 milled Stack weights enable 30 weight combinations between 0g and 300g
- Dual-purpose weight case / phone stand
- Highly engineered training club - Adult (41.5") or Junior (38.5") version
-Speed radar not included. View all compatible devices here. We recommend the PRGR


- 2-year License included, accessible on iOS only.
- Dynamic speed training formulated by Dr. Sasho MacKenzie
- Guided workout timer for reps, sets, and rest intervals
- Custom speed metrics to track your gains
- Hands-free data entry using voice entry technology
- Includes bundled access to Stack Putting ($59 value)
- Includes Single User License - Enables training and tracking for up to five local (i.e. family) users under one login.

Access TheStack App from the App Store when your order arrives. Requires iOS 15.0 or later.


PRGR Black Pocket, Red Pocket
Regardless of your distance, the PRGR is a great unit training with TheStack. It is small and packs into your golf bag easily, and gives the added benefit of being a great device to bring onto the golf course to measure ball speed while playing. Nearly all of our Tour players use the PRGR.

Flightscope Mevo+ (Stack App connectivity)
Voice Caddie Swing Caddie SC200 Plus
Garmin G80
FlightScope X3, X2, X2 Elite, Xi Tour (Stack App connectivity)
Sport Sensors Swing Speed Radar (SSR)
Yupiteru GST-5, GST-7 BLE


For all kids 10-14, we recommend TheStack Junior. For kids 15+, use the fitting chart in the product images, because we factor in their current driver length into the recommendation. If your child is under 13 years old, they must train as a Local Golfer under their parent or guardians profile in TheStack App.


I have TheStack hardware, how do I get started training?
From The App Store, download TheStack App (iOS) and login with your Apple ID.
Enter the Serial Number (the 5 digit code) found by unscrewing the threaded stem of your Stack hardware.

How do I add family members who want to train?
There are 2 options to add family members who want to train with TheStack hardware.
Option 1: You can add a family member to train on their own iOS device, just as you are. To do that, simply have that family member download the App and activate the same serial number you did. This will in no way impact your training data, and we allow a serial number to be activated several times for this purpose.
Option 2: You can add them as 'Local Golfers' - on your iOS device, under your Apple ID login. To do that, here are the steps:

1) Click Profile (top right)

2) Click on Stable of Golfers

3) Click 'Add Golfer' (top right)

4) Click 'Add a Local Profile'

How much is the App and what's included with my Stack hardware purchase?
The Stack App provides Stack Speed Training and Stack Putting training and your purchase of The Stack hardware grants you 2-years of access for free. After that, yearly access is $99/year and can be managed in the App Store. Stack Putting is purchased through the App store for $59/year.
Apple only allow us to provide one free year of the subscription at a time. So, if you purchased during a time when 2-year access was included, the first year will be delivered to you through a Free Trial and the second year of included access will be delivered via a code in the App at exactly 365 days from your start date.

Is a speed radar device required for training?
Yes, measuring your speed and dynamically adjusting your Stack Weights during your training is fundamental to The Stack System.

Used by

Matthew Fitzpatrick