Proteus Motion vs TheStack Baseball
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Proteus Motion
This app provides advanced performance training and recovery analytics. It enables low-impact, high-efficiency 3D resistance training. A Proteus System user account is required to use the app.
- Performance training analytics
- Recovery analytics
- 3D resistance training
- High efficiency training
- Low-impact training
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Proteus Motion is leading the reinvention of performance training and recovery. The Proteus System delivers breakthrough analytics and first-ever 3D resistance training for high efficiency, low-impact training. NOTE: This app requires an active user account with the Proteus System.
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 rating: TheStack Baseball at 4.9 against Proteus Motion's 3.0. TheStack Baseball also leads on update cadence (every 2 months vs every 6 months) and ratings volume (53 vs 2). Proteus Motion's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
TheStack Baseball holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: TheStack Baseball has 53 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.
Proteus Motion ships an update every 6 months, TheStack Baseball every 2 months. The most recent releases landed on September 10, 2026 and September 16, 2026 respectively.
| Parameter | Proteus Motion | TheStack Baseball |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 4.9 (53 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 2 | 53 — better |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 121 MB |
| Age rating | 4+ | 4+ |
| Developer | Proteus Motion Inc. | The Stack System Baseball GP, Inc. |
Customer experience
Proteus Motion
TheStack Baseball
In-app purchases
Proteus Motion
No in-app purchases
TheStack Baseball
No in-app purchases
Questions
Is Proteus Motion free?
Is TheStack Baseball free?
Which has better reviews, Proteus Motion or TheStack Baseball?
Do Proteus Motion or TheStack Baseball have ads?
Which is updated more often, Proteus Motion or TheStack Baseball?
Other comparisons
