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.

You'll find a Pro vs. Youth Stack Bat size calculator on the product page.

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.

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.

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