FYTT vs TheStack Baseball
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FYTT
This platform empowers athletes to enhance their fitness with personalized, data-informed training programs. It bridges the gap between collected data and workout prescriptions, adapting training in real-time to meet individual athlete needs across various sports.
- Data-driven training prescriptions
- Responsive workout adjustments
- Individualized training plans
- Athlete development platform
- Cross-sport training
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FYTT is an athlete development platform that helps athletes maximize fitness through data-driven, individualized, responsive training. Data-driven Bridge the gap between data collection and training intervention by linking data directly to workout prescriptions. Responsive Workouts and programs can automatically respond in real-time to changing athlete needs and circumstances Individualized Deliver the right training to the right athletes at the right time, no matter how many athletes you train or what sport they play.
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.
- Dynamic training programs
- Personalized speed trainer
- Track speed and metrics
- Connect with other players
- Team monitoring for coaches
- Variable inertia speed training
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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
Screenshots
Verdict
The clearest difference is review sentiment: FYTT at 83% against TheStack Baseball's 0%. FYTT also leads on ads (none vs shown). TheStack Baseball's advantage is in-app purchases (none vs 1) and rating (4.9 vs 4.5). On price, 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
Both are free to download. FYTT sells 1 in-app purchase, starting at $9.99 per month. TheStack Baseball asks for nothing beyond the download.
TheStack Baseball holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 13 and 53 respectively. Written reviews complicate that: 83% of FYTT's written reviews are positive against 0% of TheStack Baseball's, so the app with the better star average is not the one people write more warmly about.
FYTT ships an update monthly, TheStack Baseball every 2 months. The most recent releases landed on July 10, 2026 and September 16, 2026 respectively.
| Parameter | FYTT | TheStack Baseball |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (13 ratings) | 4.9 (53 ratings) — better |
| Positive reviews | 83.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 13 | 53 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Ad-supported — better |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 121 MB |
| Age rating | 4+ | 4+ |
| Developer | Fytt, Inc | The Stack System Baseball GP, Inc. |
Customer experience
FYTT
TheStack Baseball
In-app purchases
FYTT
- Intelligent Fitness Software$9.991 Month
TheStack Baseball
No in-app purchases
