Seiken Log
Karate Punch Counter
Only for iPhone
Free
iPhone
Count alternating karate punches with your iPhone camera. Track goals, streaks and titles, save short practice clips, and optionally use Apple Watch.
Seiken Log is a camera-based practice counter for alternating karate straight punches.
Mount your iPhone directly in front of you and slightly below waist height, tilted gently upward towards your chest and shoulders. On-device pose detection follows the forward and backward movement of your wrists and records each alternating punch.
FEATURES
• Automatic camera counting for alternating straight punches
• Switch between front and rear cameras
• A short confirmation sound for every count and a spoken total every 10 punches
• Set your own daily punch goal
• Calendar history, streaks and lifetime totals
• Title collections for punch totals and practice streaks
• Automatically save a short clip of about the first four punches from each session
• Compare two practice clips side by side
• Create a share card with today's count, streak and selected title
• Optional Apple Watch assistance when camera tracking is briefly lost
• A simple standalone counter on Apple Watch
HOW TO START
1. Mount your iPhone 2–3 m directly in front of you and slightly below waist height. Tilt it gently upward and make sure both shoulders and wrists are visible.
2. Extend your left fist and chamber your right fist at your waist. This starting pose is treated as zero.
3. Your next right punch starts the count.
4. End the session to view the result in your practice calendar.
PRIVACY
Camera pose analysis runs on your device. Practice clips and records are stored locally and are never uploaded automatically by the app.
Seiken Log is a practice and record-keeping aid. It does not assess technique, impact force, rank or competitive ability.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Seiken Log has received a major update.
• A new Japanese retro-game-inspired design across the app
• Custom daily punch goals, a goal celebration and a new session summary
• Titles and emblems earned through lifetime punches and practice streaks
• Clearer practice calendar and history screens
• Share cards for posting practice results
• Optional Apple Watch assistance and a simple standalone Watch counter
• Improved count correction when the camera briefly loses sight of a wrist
• A clearer camera screen for viewing both the counter and your posture
• Updated camera guidance for a low, straight-on setup
• Stability and layout improvements
The developer, Yuya Fujiwara, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yuya Fujiwara
- Size
- 19.9 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Yuya Fujiwara