# BowlTrace: Bowling Analysis — Trajectory, speed & rev rate

> Trajectory, speed & rev rate (iPhone/iPad app by ILHO PARK.)

- Source: https://appshunter.io/ios/app/bowltrace-bowling-analysis/id6792940057 (this page in markdown: same URL + `.md`)
- Developer: [ILHO PARK](https://appshunter.io/developer/6774891968)
- Category: Sports, Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 90 MB
- Languages: American English
- Released: 2026-07-29
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/bowltrace-bowling-analysis/id6792940057/reviews.md

## What is BowlTrace?

BowlTrace analyzes bowling videos shot on your phone to show the ball's
trajectory, speed, and rev rate (RPM).

Features
• Video analysis — record or pick a video to compute trajectory, speed, and rev rate
• Automatic lane calibration — detects the lane, with manual corner adjustment when needed
• Arsenal — track your balls' specs and maintenance history
• Lane patterns — auto-recognize Kegel standard sheets and visualize the oil pattern on the lane
• History — browse your analyses by date on a calendar

All videos and analysis data are stored only on your device and never uploaded.

Note: The rev rate (RPM) metric is currently in beta; recording at 60fps
improves accuracy.


## Version history (last 5 releases)

### 0.0.7 — 2026-08-25

You can now register lane patterns from a PDF.

• Register directly from a Kegel pattern sheet PDF, in addition to gallery and camera
• PDFs are sharper than photos, so auto-recognition is more accurate
• Fixed an issue where the pattern name was recognized incorrectly

### 0.0.6 — 2026-08-21

Made video analysis much faster.

• Optimized ball tracking so analysis completes much faster

### 0.0.5 — 2026-08-15

See the lane pattern right on top of your ball path.

• Overlay the selected pattern's oil distribution on the lane map
• Toggle the oil overlay on and off with the water-drop button on the result screen
• The oil distribution aligns with your ball path so you can compare your line at a glance

### 0.0.4 — 2026-08-14

Improved ball tracking accuracy and per-alley personalization.

• Fixed the ball trajectory breaking off in the later part of the lane
• Cleaned up trajectory jitter shown after impact
• Lane detection now improves when you revisit the same bowling alley
• Personalization data stays on your device and is never uploaded

### 0.0.3 — 2026-08-09

Improved lane pattern recognition and automatic lane detection.

• Added Korean and Japanese title recognition for Kegel lane pattern sheets
• Fixed the last reverse-oil section not being displayed
• Improved row recognition on pattern sheets
• Lane area is now detected more accurately in photos and videos
• Fixed lane edges being misaligned by light reflections

## More apps by ILHO PARK

- [복불복 게임(Random Game)](https://appshunter.io/ios/app/random-game/id6774891966)
- [DayDoku: Daily Sudoku](https://appshunter.io/ios/app/daydoku-daily-sudoku/id6780019972)

All apps by ILHO PARK: https://appshunter.io/developer/6774891968

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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.*