b4 vs Trace Baseball
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
b4
Enhance your baseball batting with advanced AI analysis. Track key metrics like exit velocity and launch angle, analyze biomechanics, and receive real-time feedback. Improve your swing and performance with detailed reports and video playback.
- Comprehensive swing analysis
- Exit velocity and launch angle tracking
- Bat contact point analysis
- Real-time playback and analytics
- Immersive pitch simulation
- AI-driven performance reports
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Revolutionize your baseball training experience. Enhance your batting skills, analyze your performance, and take your game to the next level. Get cutting-edge batting stats, biomechanics analysis, and real-time feedback—all with just an iPhone and a tripod! Developed with multiple Major League players. Key Features • Comprehensive Metrics: Access a complete baseball swing analysis toolset, including exit velocity, launch angle, bat path, and biomechanics analysis, to refine your skills and elevate your game. • Bat Contact Point (BCP): Precisely tracks where the bat hits the ball, giving players actionable insights on every swing. • Real-Time Playback: Review and learn from past performances with slow-motion videos, and track your progress with real-time analytics. • Immersive Pitch: An innovative feature that simulates live incoming pitches, refining your timing and reaction down to the millisecond—all from your iPhone. • Dynamic Visualizations: Easily track progress and identify your strengths. • AI Report: Gain deeper insight into your hitting performance. Track SwSp%, xwOBA, exit velocity, launch angle, and more. Batting Statistics Overview • Bat Contact Point Analysis: Your contact point range with minimum, maximum, and distribution to understand patterns and improve consistency session by session. • Bat Path Visualization: Gain in-depth insights into your bat control and make informed adjustments. • Exit Velocity Tracking: Accurately measure the speed of your hits to monitor your progress and aim for new personal bests. • Launch Angle Optimization: Perfect your launch angles for maximum performance and increase hitting probability. • Comprehensive Biomechanics Analysis: Refine your technique by understanding your stride, weight shift, and head movement. • Advanced AI Report: Track hit classifications, analyze SwSp%, xBA, xwOBA, ground-ball to fly-ball ratio, and more to pinpoint and boost your game performance. Subscriptions Our app is free for everyone to use! Access lab-level swing analysis at no cost. The Starter plan lets you analyze up to 30 swings per month. Upgrade anytime for more power! Starter Pass (Free) • 30 swings per month • Perfect for casual swing analysis and quick check-ins Essential • 100 swings per month • More reps, deeper insights, and faster improvement Premium • Unlimited swings per month • Built for dedicated athletes committed to real progress Choose Your Plan Essential • $39.99 / Yearly — Save with our annual subscription • $3.99 / Monthly — Flexible monthly subscription Premium • $149.99 / Yearly — Save with our annual subscription • $14.99 / Monthly — Flexible monthly subscription Coach Access+ • Explore enhanced plans designed specifically for coaches at all levels. Experience Future Tech Today! Dive into advanced batting metrics, enhance your sports performance in real-time, and start your science-backed journey to improvement with the b4-app – all at your fingertips.
Trace Baseball
Automatically edit and share baseball and softball game highlights with AI. Capture full games or batting practice from multiple angles in real-time. Perfect for players, coaches, and teams looking to showcase their best moments.
- AI-powered automatic highlight editing
- Real-time highlight generation
- Multi-angle recording support
- Easy social media sharing
- Unlimited teams and sharing
- 7-day free trial
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Trace Baseball is the home for your baseball and softball highlights. Capturing, viewing and sharing highlights from the diamond has never been easier. You can record full games or batting practice from one or multiple angles with the Trace Baseball app and highlights will be automatically edited for you in realtime. Watch a live stream of game highlights, share your best hits to social media, or use the video for development. No editing required! Baseball and softball highlights automatically edited for the whole team. All you have to do is press record! ■ Spend more time watching amazing highlights, not editing video. Our AI automatically edits highlights for you. All you have to do is press record. ■ Add multiple camera angles to get highlights with a professional broadcast feel! Anybody on your team with the app can join a recording session to get multiple angles of the same play. ■ Get highlights in realtime. Stop waiting. Your automatically edited highlights from multiple angles are available as soon as they happen. We even send you a push notification to let you know they’re ready if you’re not at the game. ■ Easy to capture. Easier to share. We make it easy to share your highlights to Twitter for recruiters or send them via iMessage to friends or coaches directly from our app. Access to the Trace Baseball app and all of its features requires a paid subscription. We offer a 7-day free trial to let you use and experience the app for free. After the trial, the cost of the subscription is $6.99 per month. With our subscription, you will gain access to all of the features in the app, including recording through our app, automatically edited highlights, realtime notifications, unlimited teams and sharing. Our app is constantly updated with new features and improvements to ensure you have the best experience possible. You can cancel your subscription at any time, with no strings attached. We believe in giving our users the flexibility to choose what works best for them. Standard Apple Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy - https://traceup.com/privacy-policy
Screenshots
Verdict
The clearest difference is rating: Trace Baseball at 5.0 against b4's 4.2. Trace Baseball also leads on device support (3 vs 1). b4's advantage is monetization model (freemium vs subscription) and ratings volume (152 vs 2). On price, update cadence, ads 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
Both are free to download. b4 sells 4 in-app purchases, starting at $3.99 per month and Trace Baseball sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.
Trace Baseball holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: b4 has 152 ratings behind it against 2, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on November 3, 2026.
| Parameter | b4 | Trace Baseball |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (152 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 80.6% of reviews | — |
| Number of ratings | 152 — better | 2 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium — better | Subscription |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 222 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | KeepTossingLab | AlpineReplay, Inc. |
Customer experience
b4
Trace Baseball
Bugs and requests
b4
Reported bugs
7 issues- Exit velocity readings fail after first swing
- Login fails repeatedly even after reinstalling app
- App stops providing readings mid-session
- Inaccurate measurements in certain temperature conditions
- Setup configuration not recognized despite proper calibration
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- App crashes and becomes unresponsive
- Inconsistent accuracy across different users and conditions
Requested features
4 requests- Distance tracking in feet for hit balls
- More in-depth analytics and statistics
- Support for older iPhone models
- Enhanced data visualization and reporting
Trace Baseball
Not enough reviews yet to summarise bugs or requests.
In-app purchases
b4
- Essential Plan$3.991 Month
- Premium Plan$14.991 Month
- Essential Plan$39.991 Year
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- Premium Plan$149.991 Year
Trace Baseball
- Trace Baseball+7 Days trial$6.991 Month
- Full access to app features$6.991 Month








