Comparison

TheStack Baseball vs Dirtbag Development

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
Read full description

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

Dirtbag Development

Access personalized workout programs and track your fitness journey. Monitor workouts, nutrition, habits, and measurements with coach support. Achieve your health goals with progress tracking and milestone rewards.

Highlights
  • Access training plans
  • Track workouts and meals
  • Follow exercise videos
  • Monitor daily habits
  • Set and track goals
  • Message your coach
  • Track body measurements
Features
Read full description

With the Dirtbag Development App, you will have access to workout programs designed specifically to help you reach your fitness and health goals! You can follow & track your workouts, your nutrition, your lifestyle habits, measurements and results–all with the help of your coach. FEATURES: - Access training plans and track workouts - Follow along to exercise and workout videos - Track your meals and make better food choices - Stay on top of your daily habits - Set health and fitness goals and track progress towards your goals - Gain milestone badges for achieving new personal bests and maintaining habit streaks - Message your coach in real-time - Track body measurements and take progress photos - Get push notification reminders for scheduled workouts and activities - Connect your Apple Watch to track workouts, steps, habits, and more right from your wrist - Connect to other wearable devices and apps like the Apple Health App, Garmin, Fitbit, MyFitnessPal, and Withings devices to track workouts, sleep, nutrition, and body stats and composition Download the app today!

Screenshots

TheStack Baseball4 screens
Dirtbag Development4 screens

Verdict

The call

The clearest difference is ads: Dirtbag Development at none against TheStack Baseball's shown. Dirtbag Development also leads on monetization model (free vs ad-supported) and device support (4 vs 2). TheStack Baseball's advantage is ratings volume (53 vs 1). On price, rating, update cadence and in-app purchases 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for TheStack Baseball against 5.0 for Dirtbag Development. That said, the two scores are not equally well evidenced: TheStack Baseball has 53 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

TheStack Baseball ships an update every 2 months, Dirtbag Development every 6 weeks. The most recent releases landed on September 16, 2026 and September 6, 2026 respectively.

Scorecard4 real differences · 6 level
TheStack Baseball versus Dirtbag Development: the parameters behind the verdict, then further details
ParameterTheStack BaseballDirtbag Development
PriceFreeFree
Rating4.9 (53 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings53 — better1
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.0 — better15.1
Further details — not scored
Size121 MB172 MB
Age rating4+4+
DeveloperThe Stack System Baseball GP, Inc.Dirtbag Development LLC

Customer experience

TheStack Baseball

All ratings53 ratings
Positive98.1%
Neutral1.9%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Dirtbag Development

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

TheStack Baseball

No in-app purchases

None

Dirtbag Development

No in-app purchases

Questions

Is TheStack Baseball free?
TheStack Baseball is free to download, with no in-app purchases.
Is Dirtbag Development free?
Dirtbag Development is free to download, with no in-app purchases.
Which has better reviews, TheStack Baseball or Dirtbag Development?
Dirtbag Development is rated higher. TheStack Baseball averages 4.9 out of 5 from 53 ratings, while Dirtbag Development averages 5.0 from 1 ratings.
Do TheStack Baseball or Dirtbag Development have ads?
TheStack Baseball shows ads; Dirtbag Development does not.
Which is updated more often, TheStack Baseball or Dirtbag Development?
TheStack Baseball ships an update every 2 months, and Dirtbag Development every 6 weeks. Most recently, TheStack Baseball was updated on September 16, 2026 and Dirtbag Development on September 6, 2026.

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