Website privacy
Updated 29 October 2026 · Website only (not an iOS app privacy policy)
This policy describes the website with optional Google Analytics 4 enabled only for visitors who allow website analytics. You may decline analytics and continue to browse the app collection.
1. What this website does
This website presents apps by Tsukigashizumu Studio. Visitors can choose a display language and a country or region of the App Store, inspect publicly available app information, and follow links to Apple's App Store. Choosing a country on this website does not change the country of a visitor's Apple Account or guarantee that an app can be purchased there.
2. Requests to Apple
When a storefront is selected or the catalog is loaded, the website may request public app details and prices directly from Apple's itunes.apple.com Lookup API. These requests contain the selected country code and publicly listed app IDs. Because the visitor's browser makes the request, Apple can receive technical connection information such as an IP address and browser headers according to its own practices. Following an App Store link takes the visitor to apps.apple.com, where Apple's terms and privacy practices apply. A missing lookup result is not proof that an app is unavailable for sale.
3. Information kept in the browser
The website uses local browser storage to remember the selected display language and, when manually chosen, the App Store country or region. In-memory app lookup results may be reused briefly while the page is open. The website does not require an account to browse the app collection.
4. Optional website analytics
Google Analytics 4 (GA4) is available as an optional website analytics feature. The Google Analytics script is blocked until a visitor actively allows analytics. Declining analytics does not prevent ordinary browsing or App Store links. The choice is stored in the browser and may be changed using “Analytics choices” on the app collection page.
After consent, GA4 may process website page visits, certain browser and cookie information, and clicks on App Store links to produce aggregate reporting. The GA4 user- and event-level data retention setting is 2 months, as verified by the site operator at activation. These website clicks are not proof of an App Store purchase. The current implementation does not include advertising personalization.
5. Site hosting and app-to-site links
The website uses GitHub Pages hosting. The hosting provider may process routine access data, such as requests and technical logs, according to its practices. App-to-site links are designed to carry only fixed campaign attribution labels; they do not carry an app user's name, email address, device identifier, calculation contents, or other app records. The website's use of Apple's public Lookup API is separate from consent for GA4.
6. Questions and changes
For questions about this website, contact tsukigashizumu@gmail.com. GA4 remains optional and is not loaded unless website analytics consent is granted. We will update this policy if the way this website handles information changes materially.
Detailed privacy information is available in English and Japanese. Other website interface languages currently display the English policy.