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TimeSpinner - Circle Calendar (iOS, hereinafter “the App”) protects users’ personal information appropriately in accordance with this Privacy Policy.
Last updated: October 30, 2026
Events and tags you create in the App are stored on your device. If you do not log in, events and tags never leave your device.
Only if you log in from Account in Settings, the App stores the following in Google Firebase (Authentication and Cloud Firestore, located in the Tokyo region) and syncs events and tags across devices logged in to the same account:
Your password is kept by Firebase, and the developer cannot see it. When you log in with Apple, the App does not receive your name.
Even if you do not log in, the App creates an anonymous Firebase Authentication account (a random ID) at launch to count the number of users. The anonymous account is never linked to your events, tags, email address or any other information that identifies you.
Calendar Import: If you turn on Calendar Import in Settings and allow access to calendars, the App reads events in the iPhone Calendar (including iCloud, Google and other accounts added in Settings) and shows them on the wheel. Imported events are only shown on your device. They are never stored, synced or sent.
Write to Calendar: If you turn on Write to Calendar in Settings and allow access to calendars, the App writes its events (title, date and time, repeat, notes and URL) to the TimeSpinner calendar in the Calendar app. Events you edit, add or delete in the TimeSpinner calendar are also changed in the App. The TimeSpinner calendar is created in the default account of the Calendar app (such as iCloud) and is synced according to the settings of that account. Nothing is sent to the developer’s servers. When you turn it off, the TimeSpinner calendar is deleted and the events in the App are kept.
Colors and display settings are stored only on your device and are not synced.
Purchases of TimeSpinner Plus are processed by Apple. The App checks your purchase status through Apple and does not receive your payment information.
If you do not have TimeSpinner Plus, the App shows ads through Google AdMob. Google may collect your device’s advertising identifier (only if you allow tracking), IP address and the approximate location estimated from it, data on ads shown and tapped, and crash and performance diagnostics to show and measure ads. If you do not allow tracking, ads are shown without the advertising identifier.
The App does not collect your name, contacts, precise location or browsing history. Your email address is used only if you log in.
Except as described below or as required by law, we do not provide your information to third parties.
| Service | Provider | Purpose |
|---|---|---|
| Google AdMob | Google LLC | Showing ads (only without TimeSpinner Plus) |
| Firebase Authentication / Cloud Firestore | Google LLC | Account authentication, storing and syncing events and tags, counting users |
| App Store / StoreKit | Apple Inc. | Purchases of TimeSpinner Plus |
Please refer to each company’s official page for their privacy policies.
You can delete events and tags in the App. If you are logged in, events and tags you delete on your device are also deleted from the cloud.
Tapping Delete Account in Account in Settings deletes the events and tags stored in the cloud and your account, including your email address. Events and tags on your device remain. They also remain on your device when you log out.
Deleting the App removes all events and settings stored on your device.
The App is not directed to children under 13.
This Privacy Policy may be revised in response to changes in laws or the service. For significant changes, we will notify you within the App.
Effective date: October 27, 2026