Seam is the fastest way to chart, analyze, and understand pitching performance — capturing every pitch in real time and turning it into insight, right from your phone.
Chart every pitch. Win the matchup.
Seam is the fastest way to chart, analyze, and understand pitching performance — capturing every pitch in real time and turning it into insight, right from your phone. From the first warm-up toss to the final out: capture it, break it down, and act on it.
CHART EVERY PITCH, EVERY GAME
Record pitches in real time with an interface built for the speed of the game. Tap location, type, result, and velocity so nothing slips through the cracks.
• Plot exact pitch location on the strike zone
• Track pitch type, velocity, and result in one tap
• Live count, outs, and batters faced always in view
STATS THAT TELL THE STORY
The moment the game ends, Seam turns your chart into a full breakdown — staff box score, strike percentage, first-pitch strike rate, and an overall game score.
• Staff and per-pitcher box scores
• Strike % and first-pitch-strike % at a glance
• Game Score built on a run-expectancy model
SEE EVERY PITCH IN CONTEXT
The pitch-location map plots every pitch by type so tendencies jump off the screen. Filter by pitcher, count, result, or batter hand to answer any question in seconds.
• Color-coded location map by pitch type
• Filter by count, result, and batter handedness
• Spot patterns across an outing instantly
THE WHOLE OUTING, PITCH BY PITCH
Every pitch is logged in order with type, velocity, result, and the count it came in — grouped by inning and batter, with a running line score as the game unfolds.
• Color-coded by pitch type with velocity and result
• Broken out by inning, batter, and handedness
• Running PC, BF, H, SO, and BB totals per inning
BUILT AROUND YOUR ROSTER
Save pitcher profiles to keep your staff organized and start a new game in seconds. Revisit any saved game for post-game analysis whenever you need it.
• Reusable pitcher profiles with their arsenals
• Every game saved and ready to review
• Configure velocity input and your preferred units
FOCUSED ON THE GAME
No clutter, no noise — just the tools that help you get better.
• Private by default. Without an account, everything stays on your device. Seam never sells your information.
• Zero ads. Your focus belongs on the field, not on dismissing pop-ups.
• Ready anywhere. No connection required — chart a game from any field, any time.
SEAM PRO
Seam Pro keeps your entire program in sync. Back up every chart to the cloud, work across all your devices, and make smarter calls from the dugout.
• Cloud Backup — every chart saved securely with industry-standard encryption
• Unlimited Devices — sign in anywhere and pick up right where you left off
• Offline Sync — chart with no signal; everything syncs the moment you reconnect
From rec leagues to the pros, Seam is your pitch-charting companion. Download free and chart your first game in minutes.
https://get-seam.com/privatepolicy.html
Hope you can change Fastball to 4-Seam Fastball, Change-Up to Changeup and add Slurve and Knuckle CurveI hope you can add a version for iPad tooSometimes crashes when I try to click on game log
Developer Response
Thanks for the detailed feedback.We are considering an update to pitch naming conventions and adding additional pitch types.An iPad-optimized version is currently on our roadmap.Regarding the game log crash — we’re actively investigating this. If you’re able to share any additional details (what you were doing before it happened), that would help us fix it faster.Appreciate you using the app!
ArmBarn is now Seam.
New name, new look, same pitch charting you already know. Everything you've saved comes with you — your pitcher profiles and saved games are exactly where you left them.
• Rebranded to Seam with a refreshed interface
• Updated colors and iconography throughout the app
• Performance and stability improvements
Version 3.0.0
The developer, LGT Productions, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Contact Info
User Content
Identifiers
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Financial Info
Contact Info
Usage Data
Diagnostics
Other Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
LGT Productions LLC
Size
16.4 MB
Category
Sports
Compatibility
Requires iOS 26.1 or later.
iPhone Requires iOS 26.1 or later.
Mac Requires macOS 26.1 or later and a Mac with Apple M1 chip or later.
