Pitchline: Sequence Lab
Read pitch sequences
Free · Designed for iPad. Not verified for macOS.
Read real pitch sequences. Your record shows what you miss.
Read what a pitcher is about to throw, using real game data.
Call the zone and the pitch type. Every call is recorded, so over time you can see exactly which locations and which counts you misread.
■ Replay a real inning
Pick any inning from the charted games and work through it pitch by pitch, following the score, the batters and every pitching change.
■ Scouting Notebook
Your calls become accuracy by zone, by pitch type and by count. The weakest pattern is identified for you, and a five-at-bat drill built only from real at-bats containing that pattern starts in one tap.
■ Pitcher tendencies
Arsenal, average velocity, location bias and count splits for every charted pitcher, available before you step in.
■ How this differs from the Apple Watch app
The Apple Watch app is a one-pitch game for a spare moment. This is the longer form: keep a record, analyse the pattern, and drill what you get wrong.
Game Center leaderboards supported.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New in this version:
- Pitcher tendencies: arsenal, location and count splits before the at-bat
- Scouting Notebook: accuracy by zone and by count, with your weakest pattern identified
- Drills: five real at-bats built from the pattern you miss most
- Japanese language support
- Rebuilt iPad layout that shows your record and the tendencies on one screen
- New visual design
- Fixed an error in how pitch locations were processed
The developer, Takayuki Hamuro, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Takayuki Hamuro
- Size
- 10.9 MB
- Category
- Sports
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Taka
