Privacy Policy

// NazoRaku — Last updated: October 3, 2026

Fuji Bit Inc. ("we") operates the iOS and Android app "NazoRaku" ("the App"). This policy explains how information is handled in the App.

$ Information collected

We ourselves do not collect information that identifies you. However, the third-party services built into the App may collect the following.

• Advertising data: the App shows ads through Pangle (an advertising platform operated by Bytedance). The Pangle SDK starts only after you have answered the ad choice described under "Ads and your ad choice" below; 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:
  • Device identifiers (the Android advertising ID; on iOS the IDFA, only if you allow tracking under App Tracking Transparency)
  • IP address and the approximate location inferred from it (country, region or city level)
  • Device information such as model, OS version and language
  • Interactions such as ad views, taps and video ads watched, and app usage
  • Diagnostics such as crashes and performance
  See the Pangle End User Data Privacy Policy for details.
• Purchase information: in-app purchases are processed by Apple (App Store) or Google (Google Play). To confirm which items you own, the App receives your purchase history (which items you have bought) from the store. See "In-app purchases" below.

$ Information not collected

• Information that identifies you, such as your name or email address (there is no account or sign-in)
• Payment details such as credit card numbers (payments are handled by the stores)
• Location from the device's location services such as GPS (the App does not request location permission)
• Access to contacts, photos, camera or microphone

$ Information stored on your device

The following is stored only on your device for the App to work, and is never sent to us.

• Progress and stats, such as stages cleared and your daily streak
• Hint tickets remaining and how far hints have been revealed
• Ownership of purchased items (Remove Ads, Modern Cipher Pack, Premium)
• Settings such as your ad choice

If device backup (iCloud Backup, or Google backup on Android) is turned on, progress and similar data may be included in the backup of your own Apple ID / Google account. Purchase ownership is not restored from backups; it is confirmed from each store's purchase history with "Restore".

$ Ads and your ad choice

The App is free to play. It shows a banner ad at the bottom of the home screen, the stage list and the explanation screen, and may show an interstitial (full-screen) ad at milestones (every few puzzles) when you close a clear result. When you are out of hint tickets, you can choose to watch a video ad (rewarded ad) to receive one hint ticket; it plays only if you choose it. The screen where you solve puzzles never shows ads.

On first launch the App asks: "May we show ads based on your interests (personalized ads)?" The question links to this privacy policy.

• Until you answer (initial state): the ad SDK does not start and no ad is requested.
• "Show personalized ads": you see ads, including personalized ads (on iOS, ads are personalized only if you also allow tracking in ATT; see below).
• "Don't personalize": 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).

You can change this choice at any time from "Ad settings" on the Settings screen; the change applies immediately.

On iOS, the App Tracking Transparency (ATT) prompt appears after this choice (whichever you pick). The App's choice and ATT are separate settings; on iOS, ads are personalized only if you choose "Show personalized ads" in the App AND allow tracking in ATT.

In regions where the law requires consent, such as the European Economic Area and the United Kingdom, the App asks for consent with the same question and passes your choice to the Pangle SDK.

If you purchase "Remove Ads" or "Premium", banner and interstitial ads are no longer shown. Rewarded ads appear only when you choose to watch one.

$ Advertising identifiers and opting out

On both platforms you can stop personalized ads at any time by choosing "Don't personalize" under "Ad settings" on the Settings screen.

On 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 (Google's ad settings; depending on the device it is under "Privacy" or "Google").

On iOS, the Pangle SDK can read the IDFA only if you choose "Allow" in the ATT prompt. Ads are personalized only if you choose "Show personalized ads" in the App's ad choice AND allow tracking in ATT. If you chose "Don't personalize" in the App, ads are not personalized even if ATT is allowed. If you choose "Ask App Not to Track" (or ATT is not authorized), you still see ads, but the Pangle SDK is told there is no consent to personalized ads and serves non-personalized ads only, regardless of the App's choice; the IDFA is not used. You can change ATT at any time under Settings > Privacy & Security > Tracking.

$ In-app purchases

The App offers hint tickets (consumable) and Remove Ads, the Modern Cipher Pack and Premium (non-consumable) as in-app purchases.

• Payments are processed by Apple (App Store) or Google (Google Play); we never receive or store payment details such as credit card numbers. For how the stores handle your information, see Apple's Privacy Policy and Google's Privacy Policy.
• Purchases are verified through each store, and the App keeps only their ownership status on your device. Non-consumable purchases can be restored with "Restore" in Settings, using the same Apple ID / Google account you bought with.

$ Third-party services

• Pangle — ad delivery (banner, interstitial, rewarded video)
• App Store (Apple) / Google Play (Google) — in-app purchase payments and purchase verification

$ Retention and deletion

Information stored on your device (progress, hint tickets, purchase ownership, and settings such as your ad choice) is all removed when you delete the App. Non-consumable purchases can be re-activated with "Restore". 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.

$ Children's privacy

The App is not directed primarily at children under 13 and does not knowingly collect personal information from them. If a child uses the App, please do so with a parent's consent and consider the device's ad settings.

$ Where to find this policy

This policy is always available on this page, and also from "Privacy Policy" on the App's Settings screen.

$ Changes to this policy

This policy may be revised in line with changes in law or in the App. When it changes, this page is updated along with the date above.

$ Contact