Yes, measuring your speed and dynamically adjusting your Stack Weights during your training is fundamental to The Stack Baseball.

*not all radars measures non-impact speed.

For now, TheStack Baseball App is only available on iOS, and requires using a device that is compatible with iOS/iPadOS 15.0 or later.  

A complete list of options can be found here:





If you are anxious to get started now, you can use TheStack Baseball App on an iPad - the large display makes for a great training experience - or acquire an older iPhone. 

Head to the Stack Bat Fitting Tool page to find out whether the Pro or Youth Stack bat is the right fit.

Lost a weight?  No problem, email us at info@thestackbaseball.com and let us know what you need.  We'll work out details with you to send a replacement.

Typically around 20 minutes per session.

Players will be notified on the days that they need to train, which is typically 2-3 times per week. Training programs typically take 6-8 weeks to complete.

Yes. Our Cruiser and Flex programs are designed to be used in-season or during busier times.

You can view the full list of programs on our Training Programs page.

In TheStack Baseball mobile app, you'll have access to training metrics for any player that shares their profile with you.

Your serial number is located on the threaded stem of your Stack hardware.

No! TheStack Bat is engineered and tested for non-impact training swings only.  It is not intended for ground impact, ball impact, or use with a smash bag.