About
Create and export dance formations with music. Easily arrange dancer positions on stage, and the app automatically interpolates movement. Share your choreography as MP4 videos or A4 PDFs.
What's New in タチイチ
1.4.0
September 4, 2026
ダンサーを動かした軌跡を表示できるようになりました。意図しない箇所をタップしてしまう不具合、編集画面と書き出した動画で円の位置が少しずれていた不具合、幅の狭い画面でツールバーが崩れる不具合を修正しました。 そのほか、書き出した動画を共有・保存したあとに Pro のご案内を一度だけ表示するようにしました（購入済みの方には表示されません）。App Store に新しいバージョンがあるときは画面下部でお知らせします。
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FAQ
What is タチイチ?
タチイチ is a productivity app designed for creating and exporting dance formations. It allows users to arrange dancer positions, interpolate movements, and export the choreography as MP4 videos or PDFs.
How does タチイチ handle music?
You can import your own DRM-free audio files. The app automatically interpolates movement between set positions to sync with the music. Protected songs from streaming services cannot be imported.
Can I use タチイチ offline?
Yes, タチイチ works entirely offline. All作品 (works) and audio files are handled on your device, allowing editing and confirmation even without an internet connection.
What are the limitations of the free version of タチイチ?
The free version allows for 1 work, 12 dancers, and 6 slides per work. Exports (MP4 and PDF) in the free version include a small watermark of the app name.
How much does タチイチ Pro cost?
タチイチ Pro is a one-time purchase of ¥800. It is not a subscription. This unlocks unlimited works, dancers (up to 100), and slides, and removes the export watermark.
Does タチイチ have ads?
No, タチイチ does not have advertisements. The free version includes a watermark on exports, but there are no in-app ads.
What devices does タチイチ support?
タチイチ is compatible with both iPhone and iPad. On iPad, you can edit in landscape mode, and the editing state is preserved when rotating the device.
How often is タチイチ updated?
The latest version is 1.2.1, last updated on 2026-08-22. Updates are released periodically to improve functionality and add new features.