Yumiki — Kyudo Log
Log every arrow you shoot
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Record each arrow's placement; see progress as your spread tightens (σ, centre, ellipse). Live analysis while you log, plus form check from a photo. All on device.
Counting how many arrows hit today will not show you the path to improvement.
Yumiki records where each arrow lands, and reveals your progress as the scatter of your arrows tightens — a practice log built for kyudo, Japanese archery.
■ Arrow by arrow, round by round
Record hits by tachi (round). A hit is a navy outlined circle; a miss is a crimson × — encoded by shape and colour together, so it reads correctly in black-and-white print and for colour-blind archers alike.
To record where an arrow landed, just tap the kasumi target. Four-arrow or two-arrow rounds, either way.
■ Grouping tells the real story
Hit rate is only the outcome. Yumiki derives what actually drives it:
• Spread σ, in centimetres — how large your group is
• Centre shift — whether your aim drifts high, low, left or right
• Confidence ellipse — the shape and tilt of the group
As σ shrinks and the centre moves in, the hit rate follows. You can watch improvement in the order it really happens.
■ See the whole practice
• Hit-rate and arrow-count trends
• Arrow scatter plot, with σ and centre-shift trends
• Practice frequency by weekday
• Personal best
• Calendar view, colour-coded by hit rate
■ PDF report
Export your practice to an A4 PDF — scatter plot, charts, equipment and grading history on one sheet. Show it to your teacher, or print it to mark a milestone.
■ Review your form from a photo
Estimate joint angles from a photo and tag it with the stage of hassetsu. Analysis runs entirely on your device — no photo is ever uploaded.
■ Everything around the practice
• Bows, arrows, strings and gloves, linked to each session
• Grading (dan) and examination history
• Weather, wind, condition, focus — and your own reflections
• Export and import your data
■ Privacy
No account. No network requests.
Your records, photos and analyses stay on your device. We cannot see your data, because it never reaches us.
■ Languages
日本語 / English / 简体中文
Large-text mode available in settings.
Seisha hitchū — a correct shot hits. It begins with recording correctly.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.1.0
• Redesigned Home: a monthly dashboard (vs. last month, in-month trend, by distance) with a calendar, so you can see your practice at a glance.
• New real-time shot-placement analysis on the record screen — watch the spread, grouping (σ) and centre tendency as you log.
• Hit rate and arrow count are now combined into a single dual-axis chart (in the app and the PDF report).
• Per-round auto-save — your record is never lost mid-entry.
• Streamlined the record screen to a single per-arrow input mode.
Fixes
• Shot placement was drawn vertically flipped from where you placed it — now corrected.
• Fixed opening and editing an existing record from the calendar.
• Fixed form (hassetsu) analysis not starting after uploading a photo.
No network requests. All records stay on your device.
The developer, Xiaozhou Wang, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Xiaozhou Wang
- Size
- 86.9 MB
- Category
- Sports
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Boat Wang