Privacy Policy

Effective: 2026-10-09
Updated: 2026-10-09

1. Scope of this policy
Nexus Inc. (“we”) handles information for “Moji Atsume” as described below. Letters, photos and artwork are stored and processed on your device. Firebase (Google) supports crash investigation and support inquiries. RevenueCat supports purchase verification, restoration and access management. Google AdMob serves optional video ads when the OS region is Japan. See section 5 for advertising, crash reporting and purchase management.

2. Age and guardians
The App is for users of all ages. When a minor uses it, a parent or guardian should review this policy and supervise use as appropriate. Users are not required to provide a name, date of birth, email address, school, voice, contacts or location. A parent or guardian should handle inquiries and information requests about a minor. The simple parental gate does not replace legally required consent to collecting personal information.

3. Information on the device
• Handwriting and collections: images of your writing are saved on your device to display your collection and continue practice next time. Writing a letter again replaces its collection image. Handwriting and images are handled only on your device. “Clear all” removes the current drawing. Drawing history used for Undo is discarded when you change letters or leave the practice screen. You can delete a saved collection with “Start over” after completing it, by clearing the App’s data or by deleting the App.
• Daily gallery: collected letter images, letter types, letters and collection dates and times are saved on your device for display by date. Rewriting a letter keeps earlier images. These records are handled only on your device. “Start over” does not delete gallery history. To remove all stored gallery information, clear the App’s data or delete the App.
• Sharing the collection image: only when you tap “Share”, the App combines collected letters into an image and passes it to the destination you choose. The destination handles the image under its own policies. We do not receive shared images.
• Practice progress: practiced letters and completion counts are saved on your device to display progress. These counts show practice activity and are handled only on your device. Clear the App’s data or delete the App to remove them.
• Display language: the App follows your device language setting.
• Parental-gate answers and screen state: these are used temporarily for screen interactions and are not sent to us.
• Capturing and saving photos: only when you choose to, the App captures a still photo or reads an image selected through the system photo picker and displays it locally. The camera records no audio, and the App does not read unselected photos or automatically collect your library. Choosing to save stores the photo in the dated photo gallery. Practice sheets are read on your device, and selected letter images can be saved to your Sticky Art hand and letter gallery. Photos are handled only on your device. The original is unchanged; the App attempts to remove its temporary copy after reading it.
• Sticky Art: placed letter images, colors, identifiers of used letters, completed artwork and its date, and works in progress are stored locally for continued creation and dated display. They are handled only on your device. Clearing App data or deleting the App removes this data; OS backups may retain copies.
• Home-screen widgets: letter and artwork images and display information such as dates are used on your device to display widgets. They are handled only on your device. Other people may see them on your home or lock screen; review the content and device settings.
• Saving to Photos: only when you choose to save and grant the necessary permission, the App adds an artwork image to the OS photo library. These photos remain after deleting the App and follow your photo-library, backup and photo-sync settings.
Information saved on your device may be included in backups and restores. Uninstalling the App does not necessarily delete copies in backups. Manage those through your device and cloud provider's settings.

4. Stores and operating systems
App stores, operating systems and backup services are operated separately under their providers’ privacy policies.

5. Advertising, crash reporting and purchase management
When the OS region is Japan, Google Mobile Ads (AdMob) serves optional videos explicitly started from the Hiragana purchase screen. Ads are configured with children in mind and are not personalized based on interests or behavior.
• Advertising data: Google’s advertising service may collect IP addresses used to estimate general location, app- or developer-bounded device identifiers, ad impressions, video views and interactions, app interactions such as launches, and crash, performance and diagnostic data. These support ad delivery, measurement and analytics, fraud prevention and improvements to the advertising service. We do not provide names, emails, school names, handwriting, photos, artwork or precise location to the advertising service.
• Timing and providers: after confirming that Hiragana has not been purchased, ad preparation, requests, displays and interactions send data to Google only after the user presses the video start button. Ads are not requested when Hiragana has been purchased, a purchase is being verified or purchase status is unknown. Purchasing other learning packs does not prevent optional video viewing. Google and entities involved in serving ads may process data outside Japan. Retention and deletion follow their conditions. See https://policies.google.com/privacy and https://developers.google.com/admob/ios/privacy/data-disclosure. Contact section 8 for data requests. Settings includes ad privacy options when required.
Firebase Crashlytics investigates crashes and unhandled errors to improve stability.
• Data: the type and location of the problem, when it occurred, App version, device type and OS version, installation identifiers and information about how the App was running when the problem occurred. Handwriting, photos, artwork and support messages are not sent as crash reports.
• Region and choice: reporting is enabled when the OS region is Japan. For other device regions, reporting starts only when you enable “Send crash reports” in Settings. This choice is saved on your device and can be changed at any time. All learning and purchase features work regardless of your reporting choice. The applicable setting changes with the device region, while your overseas choice is retained.
• Timing and purpose: when reporting is enabled, reports are sent automatically after errors or on subsequent launches for investigation and fixes. Unsent reports stored locally while reporting is disabled are deleted.
• Provider and location: Google Firebase Crashlytics may process and store data globally. The Tokyo/Osaka regions for feedback do not apply to Crashlytics.
• Retention: Google states that information about where crashes occurred and associated identifiers are retained for 90 days before removal from live and backup systems begins. See https://firebase.google.com/support/privacy.
• Purchase management: RevenueCat, Inc., our purchase management provider, receives an anonymous App User ID, purchase history including products, transactions and receipts, purchase access, App version, OS, device type and language information. Information is sent when you begin using the App, check purchase details, make or restore purchases, or update purchase access.
• Purposes: transaction verification, fraud prevention, unlocking packs, restoration, refund/revocation handling, confirming support purchases and purchase/revenue reporting. We do not track users across apps or websites for advertising. We do not provide names, emails, school names, handwriting, photos, a custom account ID or advertising identifiers to the purchase management provider. The store handles payment-card data.
• Retention and deletion: RevenueCat and stores retain purchase-related information as needed for access, restoration, fraud prevention, accounting and disputes. Uninstalling does not delete purchase history. Contact the section 8 address for deletion requests; when we can identify the data, we request action from providers and explain any effect on restoration beforehand. Legal retention and independently stored store records follow the relevant provider's conditions.

6. Support inquiries
If a user, parent or guardian contacts us by email, we use the reply address, message and any voluntarily supplied logs to reply, investigate problems and handle rights requests. We do not use them for advertising or profiling users. Minors should not send their name, school or handwriting images unless needed for support. If unnecessary information is received, we will assess its necessity and respond by deleting it or taking other appropriate action.
If you send feedback through the in-app Feedback form, it is handled as follows.
• Where to find it: Feedback in Settings. Child use requires a parental gate before access; adult use opens it directly.
• Information sent: the message (required), whether you want a reply, a reply email address only if you want a reply, the App version, the platform (iOS or Android), the OS version, the device model name and the device language setting. We do not send images, handwriting, names, advertising IDs or the like.
• When it is sent: only when you tap the Send button. Child use requires a parental gate before accessing the form. We never send what you are typing automatically.
• Where it goes: Firebase provided by Google, using regions in Japan (Tokyo and Osaka). When you send, Google may process connection information such as your IP address as part of operating its services.
• Purpose: to reply, investigate problems, improve the App and handle rights requests. We do not use it for advertising or profiling users.
• Retention: as with email inquiries, and as described below, we retain it only as needed for the response and to review its history, and delete it when no longer necessary.
• Notice to the operator: when feedback is stored, only a notification of receipt reaches our operator messaging tool (Discord). It contains only the App version, platform, whether a reply was requested, the time of receipt and a receipt identifier, and does not include the message, email address or device information.
• Please note: do not write information that could identify your child, such as a name or school name, or a handwriting image, or any other information unnecessary for support. When a minor sends feedback, a parent or guardian should review it first.
We retain inquiry information only as needed for the response and to review its history, reassess the need after resolution and delete it when no longer necessary. Legal retention duties or disputes may require limited further retention. Provider-controlled copies, such as email backups, are also subject to that provider's retention rules.

7. Sharing, service providers and safeguards
Except where permitted by law, we do not provide personal information received to third parties without consent. We entrust crash investigation through Crashlytics and the receipt and storage of Feedback form submissions to Google (Firebase). Advertising-related processing uses Google’s services described in section 5. We may also entrust processing to email or other providers as necessary for support. In each case we review the provider's handling and exercise appropriate oversight. Google's services may handle information outside the regions we select for operational reasons. If processing involves another country, we complete the checks and disclosures required by applicable law.
We restrict access to personnel who need it for support, protect accounts and devices, and delete unnecessary information. Contact us for a description of safeguards that can be disclosed without undermining security.
RevenueCat, Inc. processes purchase management and reporting through its and its subprocessors’ infrastructure, including in the United States. We review protections under the providers’ processing conditions. See https://www.revenuecat.com/privacy and https://www.revenuecat.com/dpa.
Firebase Hosting serves the public pages. Google handles connection information such as IP addresses for operations and abuse prevention.

8. Access, correction and deletion
Contact us to request notification of purposes, access, correction, deletion or cessation of use of personal information we hold. For a guardian's request, we may ask for the minimum information needed to identify the data and verify authority. We will explain if the law prevents us from fulfilling a request. We cannot retrieve or restore handwriting or collections we never stored. We handle requests about feedback sent through the form to the extent we can identify it from details you provide, such as when you sent it or part of the message.
For purchase-related requests, tell us the store, product and approximate purchase date. We handle identifiable records and explain a safe way to provide any further information needed. Deleting purchase data or the App is not a refund request to the store.

9. Changes and contact
We will explain material changes and their effective date in the App or on its public pages. For new purposes or transmissions, we will separately provide any consent procedures or choices required by law.
Operator: Nexus Inc.
Address: 39-10 Motoyoyogi-cho, Shibuya-ku, Tokyo 151-0062, Japan
Contact: contact@nexus-inc.net
We will respond without delay to inquiries about operator details, including our representative, and our handling of personal information.