A leader on the market in golf swing speed training. The Stack Speed trainer is a weighted swing trainer paired with an iOS app designed to increase your swing speed through guided training sessions.

TheStack Hardware

• 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 (see Fitting Juniors)
• Stack training requires a speed device that can measure swings without ball impact. We recommend bundling with Stack Radar (Bluetooth connectivity). View all compatible devices here.

TheStack App Training

Rated 4.9 with 5,000+ Reviews on App Store

• Includes 1-Year Membership to TheStack App, accessible on iOS
• Adaptive speed training formulated by Dr. Sasho MacKenzie
• Guided workout timer for reps, sets, and rest intervals
• Custom speed metrics to track your gains
• Bluetooth Connectivity to integration devices. Hands-free data entry using voice entry technology for non-integrated devices
• Membership includes Bundled access to Stack Putting ($59 value) and the Learning Library
• Train and track up to twenty local (i.e. family) users under one login. App works with Family Sharing so the entire family can train easily on separate devices
• Connect to any other Stacker using Share Codes
• Are you a Coach? Learn about our Coaches License

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

See our FAQ pages for questions about membership access.

* Speed radar not included, view all compatible devices here