PULSE VB vs b4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PULSE VB
This app monitors your volleyball training by collecting swing biomechanics data from a wrist-worn sensor. It provides daily workload targets to help build arm strength, recover faster, and manage fatigue for optimal performance on the court.
- Wearable sensor for swing biomechanics
- Daily workload targets
- Arm strength building
- Faster recovery
- Fatigue management
- Tailored training programs
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PULSE is the heartbeat of your volleyball routine. The PULSE sensor helps you build arm strength and recover faster by giving you daily workload targets. PULSE is worn on your wrist and collects swing biomechanics data. PULSE tailors your training program to your individual mechanics and workload history using biomechanics-based workload metrics. Get the most out of your reps, use a smarter training program, both in- and off-season. PREPARE TO DOMINATE PULSE gives you the information you need to be ready to dominate when you step on the court: - Build up your arm safely and effectively as you start to throw in the offseason. - Maintain your fitness from your first throw of the off-season to the last serve of your season. - Manage fatigue in between games and practice. ELIMINATE THE GUESSWORK PULSE measures the stress and intensity of every swing. Always-on workload calculations give you insight about your arm strength and preparedness so you can safely build fitness over time. Get the most from your training. Use PULSE insights to make informed decisions about your training program every day. MANAGE FATIGUE Long- and short-term throwing workloads can help you evaluate your arm health, arm strength, and fatigue so you can make the best decision for your volleyball career. Learn more about PULSE at https://www.drivelinebaseball.com/pulse
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.
Screenshots
Verdict
The clearest difference is rating: PULSE VB at 5.0 against b4's 4.2. PULSE VB also leads on in-app purchases (none vs 4) and update cadence (every 10 days vs every 3 weeks). b4's advantage is ratings volume (152 vs 1). On price and ads 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. PULSE VB asks for nothing beyond the download.
PULSE VB 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 1, so its average is the more settled of the two.
PULSE VB ships an update every 10 days, b4 every 3 weeks. The most recent releases landed on October 14, 2026 and October 30, 2026 respectively.
| Parameter | PULSE VB | b4 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.2 (152 ratings) |
| Positive reviews | — | 80.6% of reviews |
| Number of ratings | 1 | 152 — better |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 10.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 88 MB | 222 MB |
| Age rating | 4+ | 4+ |
| Developer | Driveline Baseball | KeepTossingLab |
Customer experience
PULSE VB
b4
Bugs and requests
PULSE VB
Not enough reviews yet to summarise bugs or 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
In-app purchases
PULSE VB
No 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








