Privacy Policy

Last updated: 2026-10-18

1. Operator

Koshin Murakami (individual). Contact: koshinstudio88@gmail.com

2. Information we collect

Anonymous user ID: Firebase Authentication issues an anonymous ID when you open the App.
Sign in with Apple: if you sign in to publish, like, or report, we receive the user ID issued by Apple. We do not collect your email address or name.
Content you publish: the stage data (emitter settings, etc.), stage name, author name, the replay of your clear, publish time, and device language.
Usage: play counts, clears, likes, and reports (including which stage was reported by whom).
Comments and rankings: comments you write (text, time, ranking name) and clear records you send to the ranking (clear time or damage, plus a replay used for verification). A ranking name consists only of words provided by the App and an automatically assigned 4-digit number; it contains no real name.
Ads: ad impressions and interactions; if you allow tracking, the advertising identifier (IDFA).
Purchases: whether you purchased "Remove Ads", looks, shot styles, or "Your own images". We do not collect payment details.
Your own images: images you choose for the "Your own images" feature are stored only on your device. We never upload or collect them, and we do not access your whole photo library (the App only receives the single image you pick).
Server logs: IP addresses and similar data are temporarily logged to operate the servers.

3. How we use it

To publish, display, and share stages; handle abuse and inappropriate content; compute play statistics; serve ads; manage purchase status; and improve and support the App.

4. Service providers

Google (Firebase: authentication, database, storage, functions, hosting)
Apple (Sign in with Apple, App Store, in-app purchase)
Google AdMob (ads)
RevenueCat (purchase status)

These providers handle data under their own privacy policies. Data may be processed on servers in Japan, the United States, and other countries.

5. Ads and tracking

Before showing ads, we ask for consent where required by local law (Google User Messaging Platform). If you decline iOS "Allow Tracking", the advertising identifier is not used and ads are not personalized. You can change this anytime in iOS Settings.

6. What is public

Published stages, stage names, author names, play/clear/like counts, comments, and ranking names and records are visible to other users. Other data (user ID, reports, block list) is not public. Your list of blocked authors is stored on your device.

7. Retention and deletion

You can delete your account anytime from Settings in the App. We then delete (or unpublish) the stages, comments and ranking records you published, and related data. Records needed for safety, such as reports, may be kept in a form that does not identify you.

8. Children

The App is not directed at children. Parents should supervise what children publish.

9. Changes

We will announce changes to this policy on this page.

10. Contact

For access or deletion requests, contact koshinstudio88@gmail.com.