Comparison

The Stack System vs TheStack Baseball

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

Head to head
About

The Stack System

Enhance your golf game with science-based training modules for speed, wedging, and putting. Improve distance, accuracy, and consistency with personalized practice sessions and detailed analytics. Requires compatible hardware.

Highlights
  • Variable inertia speed training for distance
  • Science-based wedge distance control
  • Gamified putting practice and analytics
  • Personalized practice sessions
  • Real-time scoring and insights
  • Customizable training modes
Features
Read full description

The award-winning golf training app trusted by more than 75,000 golfers — built to help you hit longer drives, wedge it closer, make more putts, and understand your game like never before. STACK SPEED TRAINING Creates personalized training programs designed to help you swing faster and drive the ball farther. TheStack hardware is required. STACK STATS (NEW) Tracks your on-course performance and shows where you can improve. Identify strengths and weaknesses with advanced insights across every club, distance, lie, and more. STACK WEDGING Sharpens your distance control from 140 yards and in with gamified combines and real-time feedback powered by Stack Radar. PRACTICE TRACKER Elevates range sessions with structured full-swing practice and shot tracking for every club in your bag using Stack Radar. STACK PUTTING Combines intentional practice with data-driven analytics so you can test equipment, identify tendencies, and make more putts. LEARNING LIBRARY Access 60+ instructional videos from PGA Tour coach Dr. Sasho MacKenzie covering the key concepts, feels, and drills behind efficient swings and faster speeds. MEMBERSHIPS TheStack Premium Membership — $129/year Includes Stack Speed Training, Stack Stats, Stack Wedging, Practice Tracker, Stack Putting, and the Learning Library TheStack Speed Membership — $99/year Includes Stack Speed Training, Stack Wedging, Practice Tracker, Stack Putting, and the Learning Library TheStack Scoring Membership — $99/year Includes Stack Stats, Stack Wedging, Practice Tracker, Stack Putting, and the Learning Library Payment is charged to your Apple account after purchase. Subscriptions auto-renew unless canceled at least 24 hours before renewal. Any unused portion of a free trial is forfeited upon purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

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

Screenshots

The Stack System4 screens
TheStack Baseball4 screens

Verdict

The call

The Stack System and TheStack Baseball both sit at 4.9 stars, but that hides the real split: 87% of The Stack System's written reviews are positive against 0% of TheStack Baseball's. The Stack System also leads on ads (none vs shown) and ratings volume (7K vs 53). TheStack Baseball's advantage is in-app purchases (none vs 8). On price, rating, update cadence 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. The Stack System sells 6 in-app purchases, starting at $9.99 per 7 days. TheStack Baseball asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for The Stack System against 4.9 for TheStack Baseball. That said, the two scores are not equally well evidenced: The Stack System has 7K ratings behind it against 53, so its average is the more settled of the two. Written reviews are what separate them: 87% of The Stack System's written reviews are positive against 0% of TheStack Baseball's.

UpkeepUpdate frequency

The Stack System ships an update monthly, TheStack Baseball every 2 months. The most recent releases landed on September 24, 2026 and September 16, 2026 respectively.

Scorecard6 real differences · 5 level
The Stack System versus TheStack Baseball: the parameters behind the verdict, then further details
ParameterThe Stack SystemTheStack Baseball
PriceFreeFree
Rating4.9 (7K ratings)4.9 (53 ratings)
Positive reviews87.0% of reviews — better0.0% of reviews
Number of ratings7K — better53
Update frequencyMonthly — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFreemiumAd-supported — better
Best chart rank#162 — better—
DevicesiPhoneiPhone, iPod — better
Requires iOS16.215.0 — better
Further details — not scored
Size213 MB121 MB
Age rating4+4+
DeveloperThe Stack System, LPThe Stack System Baseball GP, Inc.

Customer experience

The Stack System

All ratings7,009 ratings
Positive98.9%
Neutral0.8%
Negative0.3%
Written reviews138 reviews
Positive87.0%
Neutral5.8%
Negative7.2%

TheStack Baseball

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

Bugs and requests

The Stack System

Reported bugs

2 issues
  • Putting app not working properly
  • Slope percentage input issue

Requested features

3 requests
  • Calendar integration
  • Music/podcast playback integration
  • Apple Watch support

TheStack Baseball

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

The Stack System

Subscriptions6
  • Stack Putting 1 Week$9.997 Days
  • Stack Putting 1 Wk$9.997 Days
  • TheStack Speed Training3 Days trial$14.997 Days
Show 3 more
  • TheStack Scoring Membership3 Months trial3 variants$99.001 Year
  • TheStack Speed Membership$99.001 Year
  • TheStack Premium Membership1 Year trial$129.001 Year
None

TheStack Baseball

No in-app purchases

Questions

Is The Stack System free?
The Stack System is free to download, with in-app purchases available.
Is TheStack Baseball free?
TheStack Baseball is free to download, with no in-app purchases.
Which has better reviews, The Stack System or TheStack Baseball?
The Stack System and TheStack Baseball are both rated 4.9 out of 5 on the App Store, from 7K and 53 ratings respectively.
Do The Stack System or TheStack Baseball have ads?
TheStack Baseball shows ads; The Stack System does not.
Which is updated more often, The Stack System or TheStack Baseball?
The Stack System ships an update monthly, and TheStack Baseball every 2 months. Most recently, The Stack System was updated on September 24, 2026 and TheStack Baseball on September 16, 2026.

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