Last updated: October 6, 2026
Fuji Bit Inc. ("we") respects the privacy of users of our app "Jigendentaku" (the "App"). This policy explains what information the App handles.
1. Information We Collect
We ourselves do not collect information that identifies you. The App shows a banner ad at the top of the screen through Pangle (an advertising platform operated by ByteDance). The Pangle SDK starts only after you have answered the ad choice described in "4. Ads and Ad Settings"; until then the ad SDK collects nothing and no ad is requested. After that, for ad delivery, measurement, analytics and fraud prevention, the Pangle SDK may collect the following and share it with advertising partners that bid for the ad:
- Advertising identifier — the Android advertising ID; on iOS the IDFA, only if you allow tracking under App Tracking Transparency
- Identifier assigned by Pangle (user ID)
- IP address and the approximate location inferred from it (country, region or city level)
- Device information — model, OS version, language and similar
- Ad interactions — ad views and taps, and app usage
- Diagnostics — SDK crashes and performance
- Other data — other data collected by the Pangle SDK for ad delivery
In addition, anonymized crash reports are received through the Apple / Google platforms and used to improve quality.
We do not collect personally identifiable information such as your name, email, phone number, GPS location, or contacts. The numbers, units and results you enter into the calculator are processed only on your device and are never sent or stored.
2. Purposes
- Ad delivery and display, ad measurement, analytics, and fraud prevention (personalization only if you consent)
- Bug analysis and quality improvement
3. Third-Party Services
The App uses the following third-party services:
- Pangle — ad delivery. See the Pangle End User Data Privacy Policy.
- Apple / Google — in-app purchase payment processing and platform-standard anonymized crash reporting.
We do not share user information with any other third parties.
4. Ads and Ad Settings
Before any ad SDK is started, the App asks on its own "About ads" screen: "May we show ads tailored to your interests (personalized ads)?"
- Until you answer (initial state): the ad SDK does not start and no ad is requested.
- "Allow": you see ads, including personalized ads.
- "Don't allow": you still see ads, but they are not personalized (the Pangle SDK is told there is no consent to personalized ads and serves non-personalized ads only).
Your choice is stored only on your device and can be changed at any time from "Ad settings" in the App's Settings screen. In regions where the law requires consent, such as the European Economic Area and the United Kingdom, the App asks with the same screen and passes your choice to the Pangle SDK.
5. App Tracking Transparency (iOS) and Advertising Identifiers
- iOS: The App Tracking Transparency (ATT) prompt appears after the choice above (whichever you pick). The Pangle SDK can read the IDFA only if you choose "Allow" in the ATT prompt. If you chose "Don't allow" in the App's ad settings, ads are not personalized even if ATT is allowed. You can change ATT at any time under Settings > Privacy & Security > Tracking.
- Android: The Pangle SDK uses the advertising ID for ad delivery. You can delete or reset it, or turn off personalized ads, under "Ads" in the device's Settings app (depending on the device it is under "Privacy" or "Google").
- All features remain free even if you decline both.
6. In-App Purchase (Remove ads)
The App offers a one-time in-app purchase (¥150) that removes banner ads. If you have purchased it, no ads are shown, neither the ad settings question nor the ATT prompt appears, and the Pangle SDK is never started. Payment is processed by Apple's App Store and Google Play; we never receive payment details such as card numbers, names, or addresses.
- The App only reads the purchase state for the store account on the device (StoreKit 2 entitlements on iOS, Google Play Billing purchase records on Android).
- That state is fetched from Apple/Google and is never sent to or stored on our servers (we do not operate a server for this app).
- So that ads can be hidden right from launch, the App caches a yes/no flag of whether Remove ads was purchased on your device. This cache is never sent anywhere.
- With the same Apple ID / Google account, "Restore Purchase" in Settings re-enables it on a new device.
- It is a one-time purchase, so there is no auto-renewal or recurring billing. Refunds follow each store's policy.
7. Children's Privacy
The App can be used by people of all ages, but it is not directed at children under 13, collects no age information, and does not knowingly collect data from children. Parents can choose "Don't allow" in "Ad settings", reset the advertising ID, or decline tracking under App Tracking Transparency.
8. Retention and Deletion
The App's setting (your ad settings choice) and the cached Remove ads purchase state (a yes/no flag) are stored only on your device and is removed when you delete the App. We hold no data tied to you, so there is no data for us to disclose or delete on request. Requests to access or delete data collected by Pangle can be made to Pangle through the contact given in the Pangle End User Data Privacy Policy.
9. Changes to This Policy
We may update this policy without prior notice. Material changes will be communicated via app updates or this page.
10. Contact
For questions about this policy, contact us at support@fujibit.com.