# Pitchline: Sequence Lab — Read pitch sequences

> Read pitch sequences (iPhone/iPad app by Takayuki Hamuro.)

- Source: https://appshunter.io/ios/app/pitchline-sequence-lab/id6761327373 (this page in markdown: same URL + `.md`)
- Developer: [Takayuki Hamuro](https://appshunter.io/developer/1875707249)
- Category: Games, Sports, Sports, Trivia
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 10 MB
- Languages: American English, Japanese
- Released: 2026-03-31
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/pitchline-sequence-lab/id6761327373/reviews.md

## What is Pitchline?

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.


## Version history (last 5 releases)

### 1.4.0 — 2026-08-19

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

### 1.3.2 — 2026-08-09

• Added anonymous usage statistics — aggregate counts only, with nothing that identifies you — to help improve the app

### 1.3.1 — 2026-06-09

Refreshed the app icon with a new look.

### 1.3.0 — 2026-05-01

Fixed leaderboard display issue.
Performance improvements and bug fixes.

### 1.2.0 — 2026-04-11

Performance improvements and bug fixes.

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## More apps by Takayuki Hamuro

- [Motionline](https://appshunter.io/ios/app/motionline/id6759052131)
- [Wordsline](https://appshunter.io/ios/app/wordsline/id6759517801)
- [TracelinePhone](https://appshunter.io/ios/app/tracelinephone/id6760141686)
- [PrimeTimeline](https://appshunter.io/ios/app/primetimeline/id6760607676)
- [Double Tap 10](https://appshunter.io/ios/app/double-tap-10/id6760717214)
- [Double Tap 10+](https://appshunter.io/ios/app/double-tap-10-plus/id6761082183)

All apps by Takayuki Hamuro: https://appshunter.io/developer/1875707249

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*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 2026-08-26.*