Comparison

TheStack Baseball vs The Bullpen Baseball Method

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TheStack Baseball

Enhance your baseball performance by increasing bat speed through dynamic, personalized training programs. Track your progress, connect with other players and coaches, and optimize your workouts for maximum gains. Requires a Stack Bat to begin.

Highlights
  • Dynamic training programs
  • Personalized speed trainer
  • Track speed and metrics
  • Connect with other players
  • Team monitoring for coaches
  • Variable inertia speed training
Features
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Biohack your Bat Speed so that you can swing faster & play better. From the team that brought you the Award-Winning Stack System loved by over 45,000 golfers, Dr. Sasho MacKenzie has now applied his years of speed research to create the most effective way to increase your bat speed. Players, Coaches, and Organizations across all levels of baseball can now systematically gain bat speed to hit the ball harder, farther, and have more success at the plate. What’s Inside TheStack Baseball App: * Dynamic Training Programs Customized variable inertia speed training (precision overload and overspeed) - the most efficient way to increase your bat speed. The App responds to your progress and continuously optimizes your training. The algorithms that power dynamic programming come from years of research by leading sports scientist, Dr. Sasho MacKenzie and insights from over 25 million swings from The Stack System golf’s solution. * Your Own Personal Speed Trainer Be guided through scheduled workouts while tracking Stack weight, rest, recovery, and performance gains. This information allows future workouts to be adjusted behind the scenes, so your training is optimized to maximize bat speed gains. * Track Speed, Share Metrics Seamless connection to the Stack Sensor, which is integrated into the TheStack Bat. Train anywhere, anytime. Track key performance metrics such as Stack Speed, Distance Potential, Bat Speed and Grit Score. Easily share your progress and gains. * Connect to Others Easily connect and follow other Stackers' progress and keep each other on track with your training. If you’re a Coach, add your whole team and monitor progress. *** To start speed training, you will need a Stack Bat. Terms of Use: http://www.apple.com/legal/itunes/appstore/dev/stdeula

About

The Bullpen Baseball Method

Read full description

Download The Bullpen Baseball Method app to easily book classes and manage your fitness experience - anytime, anywhere. Make a reservation, get added to a wait list, check your profile and membership status, and more – all from your device. Visit https://thebullpen954.com/ to learn more.

Screenshots

TheStack Baseball4 screens
The Bullpen Baseball Method4 screens

Verdict

The call

The clearest difference is ads: The Bullpen Baseball Method at none against TheStack Baseball's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TheStack Baseball ships an update every 2 months, The Bullpen Baseball Method every 5 weeks. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

Scorecard1 real difference · 9 level
TheStack Baseball versus The Bullpen Baseball Method: the parameters behind the verdict, then further details
ParameterTheStack BaseballThe Bullpen Baseball Method
PriceFreeFree
Rating4.9 (53 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings53 — better—
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size121 MB32 MB
Age rating4+4+
DeveloperThe Stack System Baseball GP, Inc.SFB Baseball Development, LLC

In-app purchases

None

TheStack Baseball

No in-app purchases

None

The Bullpen Baseball Method

No in-app purchases

Questions

Is TheStack Baseball free?
TheStack Baseball is free to download, with no in-app purchases.
Is The Bullpen Baseball Method free?
The Bullpen Baseball Method is free to download, with no in-app purchases.
Do TheStack Baseball or The Bullpen Baseball Method have ads?
TheStack Baseball shows ads; The Bullpen Baseball Method does not.
Which is updated more often, TheStack Baseball or The Bullpen Baseball Method?
TheStack Baseball ships an update every 2 months, and The Bullpen Baseball Method every 5 weeks. Most recently, TheStack Baseball was updated on October 3, 2026 and The Bullpen Baseball Method on October 8, 2026.

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