# HeyBLU: Baseball Strike Zone — Objective player development > Objective baseball and softball pitch analysis and player development tool. (iPhone/iPad app by Big League Ballpark, Inc.) - Source: https://appshunter.io/ios/app/heyblu-baseball-strike-zone/id6479205383 (this page in markdown: same URL + `.md`) - Developer: [Big League Ballpark, Inc](https://appshunter.io/developer/1733552856) - Category: Sports - Price: Free with in-app purchases - Rating: 4.90/5 from 15 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 69 MB - Languages: American English - Released: 2026-07-16 - Data updated: 2026-08-25 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/heyblu-baseball-strike-zone/id6479205383/reviews.md ## What is HeyBLU? Every bullpen deserves BLU (Big League Umpire). Stop guessing, start seeing every pitch and make your next bullpen count. HeyBLU turns your iPhone into an objective source of truth for youth baseball and fastpitch softball. Mount your phone, set the zone, and get live audio “BALL” or “STRIKE” calls the moment the pitch crosses the plate. No expensive equipment, radar guns, or smart baseballs required. Just the iPhone you already carry. Built for the dirt field, HeyBLU works anywhere—no cell service or Wi-Fi needed. FOR THE COST OF ONE GAME UMPIRE Imagine having a consistent, objective strike zone for every practice, scrimmage, and bullpen all year long—for the exact same price as hiring a single youth umpire for one game. ESTABLISH COMMAND HeyBLU delivers the exact data pitchers and coaches need to build unshakeable confidence. Live Audio Calls: Instant ball or strike audio via your iPhone, Bluetooth speaker, or earbuds. Train to Your Zone: Fully adjustable strike zone height and width to perfectly match your league or age group. Every Pitch Tells a Story: Objective heatmaps and pitch logs. Track plate-crossing locations, pitch counts, and estimated velocity to identify patterns and manage workloads. Baseball & Fastpitch: Tailor the session to standard baseballs or 11-inch/12-inch softballs. Follow Live: Share a live, read-only feed to a second device so coaches or parents can track locations directly from the dugout or stands. BUILD BETTER BALLPLAYERS HeyBLU is a complete player development platform built for the youth game. Own the Zone (Command Center): Sync a second device to select the intended pitch location before the throw. HeyBLU compares the actual result with the target to generate a command effectiveness rating. Earn Your Innings: Track, save, and compare pitcher performance over time to prove exactly who hits their spots. Solo Bullpens: Get instant audio feedback while throwing alone—no catcher or umpire needed. Batter’s Eye Development: Give young hitters a consistent zone to build elite plate discipline instead of relying on “close enough” coaching angles. Umpire Training: Give aspiring umpires an objective reference tool to train their eyes and evaluate their calls. START YOUR 14-DAY FREE TRIAL Track your next bullpen completely free for 14 days. HeyBLU is just $4.99/month or $49.99/year in the U.S. and unlocks unlimited pitcher profiles, command heatmaps, saved reports, and data exports. Subscription auto-renews unless cancelled. ## Key features - Live audio ball/strike calls - Adjustable strike zone - Pitch heatmaps and logs - Estimated velocity tracking - Command effectiveness rating - Pitcher performance tracking - Batter's eye development tool ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro Monthly | $4.99 | per month | | Pro Annual | $49.99 | per year | ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/heyblu-baseball-strike-zone/id6479205383/reviews.md ### 5/5 — Baseballs & Softballs *2026-08-09* Great app! ### 5/5 — BLU Bestie *2026-07-23* Used BLU with a couple college players throwing a bullpen session. 5 minute set up and when BLU called the first few pitches in a row.. these college athletes lost their collective minds….🤯⚾️🙌” ### 5/5 — Very effective cool app!!! *2026-07-21* I tried the Hey Blu app in the batting cage and pitching sessions using both baseballs and softball and also used the app during my softball games. Found the setup is very easy to do following the on screen prompts and the app works great calling balls and strikes and keeping track of the number of pitches and pitch location. Very cool app and highly recommend it for coaches, players and parents! ### 5/5 — Very cool app *2026-07-21* Just used it with my two sons. Once we set it up, it worked perfectly. After the session, each had the hard data of exactly where each pitch crossed the plate. We used it with a Bluetooth speaker and it was really fun to hear the loud STRIKE! calls. Will definitely be telling my other baseball dads about this. ### 5/5 — Total game changer. *2026-07-21* I’ve never known enough about baseball to call balls and strikes myself, so backyard practice was always tricky. Now with HeyBLU, the kids run their own games, or my son and I can actually work on his pitching together, without second guessing the strike zone. It’s been great to be part of his improvement in this way. I can pull up stats afterward and actually talk about them with his coaches, instead of just nodding along. Total game changer, for everyone. ### 5/5 — Cool app!!! *2026-07-21* Went through the set up process step-by-step, put it in the tripod and it worked right away. Great to get real time feedback and then a summary of the session at end. Still exploring the other features. Fun app!!! ### 5/5 — Absolute game changer! *2026-07-18* It is amazing how simple and effective this is! I got for my kids to track bullpen sessions and he can clearly see how many balls and strikes he’s throwing, velocity and what zone (1-9) he’s having issues hitting consistently. So worth it if your kids are in baseball. Necessity if they are in higher levels like travel ball. This little app is going to change baseball! ### 5/5 — Exciting for Families and coaches! *2026-07-17* After playing with the app and watching some videos and how to use it I am very excited about this as a parent and a Coach. This is transformative for young athletes in training for baseball and Softball. ### 4/5 — More than a baseball training app *2026-07-17* I’m not a baseball expert, but after watching the demonstration and exploring the app, I could clearly see the value. HeyBLU gives players, parents, coaches, and even umpires access to real-time ball-and-strike feedback and pitch information. I especially like that it can be used during practice or games and gives everyone a more objective reference point. The app has several features, so it may take a little time for a new user to learn everything, but the guided setup helps. I think this could be a valuable tool for serious baseball and softball families. ## Frequently asked questions about HeyBLU ### What is HeyBLU? HeyBLU is a player development platform that uses your iPhone to provide objective strike zone calls and pitch data for baseball and softball. It aims to improve pitcher command and batter's eye without expensive equipment. ### How does HeyBLU work? You mount your iPhone, set the strike zone, and the app provides live audio "BALL" or "STRIKE" calls as pitches cross the plate. It also tracks pitch locations, counts, and estimated velocities. ### Can I use HeyBLU offline? Yes, HeyBLU is built for the dirt field and works anywhere, requiring no cell service or Wi-Fi. This makes it ideal for practices and games in various locations. ### What are the subscription options for HeyBLU? HeyBLU offers a 14-day free trial. After the trial, it costs $4.99 per month or $49.99 per year in the U.S., unlocking unlimited profiles, heatmaps, reports, and data exports. ### How does HeyBLU help with umpire training? It serves as an objective reference tool for aspiring umpires to train their eyes and evaluate their calls against the app's consistent strike zone. ### What devices does HeyBLU support? HeyBLU is supported on iPhone and iPad devices. It is designed for iOS users looking to enhance baseball and softball development. ### How often is HeyBLU updated? The latest version is 1.0.1, released on July 18, 2026. Updates are provided regularly to improve functionality and add new features based on user feedback. ### Can coaches or parents view pitches remotely with HeyBLU? Yes, you can share a live, read-only feed to a second device. This allows coaches or parents to track pitch locations directly from the dugout or stands. ## Version history (last 5 releases) ### 1.0.4 — 2026-08-11 More control of the tracking iPhone with an iPad or 2nd iPhone including its own "Ball" and "Strike" audio calls for easier volume and Bluetooth controls. Hear calls anywhere on the field, or on the device in your hand. Some minor bug fixes and cleaner onboarding screens. ### 1.0.3 — 2026-07-28 Fastpitch Softball feedback fixes. Now with all mound distances by age group starting at 8U up to College distances. Command training (need a 2nd device) now has softball specific pitch types including Rise and Drop balls. We also added Sinker (SI) to the baseball version of the Command trainer. ### 1.0.2 — 2026-07-26 Command Center now gives you full control of the tracking iPhone. Run the whole session remotely — start/stop, settings, live and past pitch review — from a second iPhone or iPad. Plus smarter per-pitcher reports for when multiple pitchers throw during the same bullpen, tryout or other pitching session. ### 1.0.1 — 2026-07-18 • Cleaner Settings — advanced options (Auto-hold, Detection Confidence) are now grouped under an Advanced section • More reliable Ball/Strike call announcements during play • General stability and polish improvements ### 1.0.0 — 2026-07-16 No release notes. ## Related topics [baseball umpire digital coach](https://appshunter.io/ios/topics/baseball-umpire-digital-coach) · [motusbatting](https://appshunter.io/ios/topics/motusbatting) · [the players zone](https://appshunter.io/ios/topics/the-players-zone) · [watching apps baseball](https://appshunter.io/ios/topics/watching-apps-baseball) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*