Comparison

TPI Pro vs The Stack System

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

Head to head
About

TPI Pro

This app helps certified fitness professionals screen clients and build personalized training programs. It offers an extensive video library of exercises and allows for custom program creation and client progress tracking. Clients receive programs directly through a companion app.

Highlights
  • Client screening and assessment
  • Auto-generated and custom training programs
  • Extensive exercise video library
  • Client program delivery via MyTPI app
  • Progress tracking and program modification
  • Unlimited clients and video storage
Features
Read full description

Quickly screen clients and create auto-generated or custom training programs for them to receive via the MyTPI client app. Access the extensive TPI video library of exercises and golf drills or easily upload your own to create truly personalized programs. The TPI Pro app lets your clients know you are one of the elite practitioners in the industry and helps them stay on track with your assigned programming. Core functionality of the app includes: • Easily perform the Level 1 screen and see the color-coded results with predicted swing characteristics. • Fitness 2 Certified Pros can use the Fitness & Power screen to assess their athletes’ power capacity and identify opportunities in their training. • Use the power of the “TPI Rx” to let TPI’s advanced algorithms auto-generate training programs. • Send screen results and training programs directly to athletes via the MyTPI client app. • Access TPI’s extensive video library of golf-fitness related drills and exercises to build custom training or practice programs. • Upload your own videos to create a personalized library of exercises, swing drills and workouts. • Keep track of your client’s screen results over time and easily modify their training program as they progress. • The TPI Pro app allows for an unlimited number of clients and an unlimited amount of video library storage. The TPI Pro app is only available to TPI Certified members with Active membership status and is free for both you and your clients!

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

Screenshots

TPI Pro4 screens
The Stack System4 screens

Verdict

The call

The clearest difference is in-app purchases: TPI Pro at none against The Stack System's 8. TPI Pro also leads on review sentiment (100% vs 87%) and device support (3 vs 1). The Stack System's advantage is ads (none vs shown) and ratings volume (7K vs 11). On price, rating and update cadence 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. TPI Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for TPI Pro against 4.9 for The Stack System. That said, the two scores are not equally well evidenced: The Stack System has 7K ratings behind it against 11, so its average is the more settled of the two. Written reviews are what separate them: 100% of TPI Pro's written reviews are positive against 87% of The Stack System's.

UpkeepUpdate frequency

TPI Pro ships an update every 2 months, The Stack System monthly. The most recent releases landed on June 11, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 3 level
TPI Pro versus The Stack System: the parameters behind the verdict, then further details
ParameterTPI ProThe Stack System
PriceFreeFree
Rating4.8 (11 ratings)4.9 (7K ratings) — better
Positive reviews100.0% of reviews — better87.0% of reviews
Number of ratings117K — better
Update frequencyEvery 2 monthsMonthly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank—#174 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.2
Further details — not scored
Size39 MB213 MB
Age rating17+4+
DeveloperACTPI LLCThe Stack System, LP

Customer experience

TPI Pro

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

The Stack System

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

Bugs and requests

TPI Pro

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

TPI Pro

No 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

Questions

Is TPI Pro free?
TPI Pro is free to download, with no in-app purchases.
Is The Stack System free?
The Stack System is free to download, with in-app purchases available.
Which has better reviews, TPI Pro or The Stack System?
The Stack System is rated higher. TPI Pro averages 4.8 out of 5 from 11 ratings, while The Stack System averages 4.9 from 7K ratings.
Do TPI Pro or The Stack System have ads?
TPI Pro shows ads; The Stack System does not.
Which is updated more often, TPI Pro or The Stack System?
TPI Pro ships an update every 2 months, and The Stack System monthly. Most recently, TPI Pro was updated on June 11, 2026 and The Stack System on September 24, 2026.

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