This Privacy Policy explains how Yomoyo LLC ("Yomoyo," "we," "us," or "our") collects, uses, discloses, and protects information when you use the Yomoyo mobile application, yomoyo.app, and related services (collectively, the "Service").
By using the Service, you acknowledge the practices described in this Policy. If you do not agree, please do not use the Service.
1. Information we collect
Account and authentication information
Yomoyo initially creates an anonymous Firebase account so that the Service can save your progress without requiring an email address or password. You may optionally use Connect Account to add an email address and password to that account, or sign in to an existing Yomoyo account. We and our service providers may process:
- A randomly generated Firebase user identifier and account creation time.
- If you connect or sign in to an account, your email address, authentication provider and status, and related sign-in and security information.
- Device and network information processed in connection with the Service, such as device type, operating system, app version, user-agent string, IP address, and diagnostic request information.
- Your device timezone and local date, which are used to calculate daily activity, streaks, quests, and time-based progress.
Email and password credentials are submitted to and handled by Firebase Authentication. Yomoyo does not store your plaintext password in its app database or logs. Firebase Authentication may use user-agent strings, IP addresses, and related technical information for authentication, security, and abuse prevention. Cloud Functions may temporarily process IP addresses when handling requests.
Preferences and game progress
We collect information needed to save and synchronize your experience, including:
- App language, reading text size, and onboarding status.
- Level, experience points, streaks, daily activity, and quest progress.
- Your selected Kotobakami partner and captured Kotobakami.
- Reading history and progress, including stories opened, paragraph and character position, completion status, and related timestamps.
- Vocabulary-list names, saved word, kanji, and grammar entry identifiers, and the reading sentence and story context associated with a saved entry.
- Flashcard progress and session results.
Learning activity
To operate game systems, learning features, and progress statistics, we collect events such as:
- Dictionary entries opened, including entry type, identifier, and JLPT level when available.
- Words looked up while reading, including the displayed word, story identifier, paragraph, and character offsets.
- Vocabulary entries saved and the lists to which they are saved.
- Flashcard sessions, entries reviewed or cleared, and completion status.
- Reading duration, effective reading-character counts, and data needed to resolve in-game encounters and rewards.
Subscription and transaction information
If you purchase Yomoyo Pro, the purchase is processed by Apple App Store or Google Play and managed for us through RevenueCat. We do not receive your full payment-card number. We and these providers may process a Yomoyo user identifier, product and entitlement information, purchase status, receipt or purchase token, transaction dates, last-seen time, device type, and operating system to complete purchases, restore access, prevent fraud, and manage subscription status.
Support communications
If you contact us, we receive the information you choose to provide, such as your email address, message, attachments, and information needed to investigate your request.
Website information
The Yomoyo website does not currently use advertising trackers or analytics cookies. Our hosting and infrastructure providers may process standard server-log information, such as IP address, browser or device information, requested page, and request time, to deliver and secure the website.
Information we do not request
The current version of Yomoyo does not request access to your camera, microphone, contacts, precise location, photo library, or advertising identifier. Yomoyo does not display third-party advertising.
2. How we use information
We use information to:
- Create, connect, authenticate, and secure accounts and enable access across devices.
- Provide, synchronize, maintain, and personalize the Service.
- Save reading progress, vocabulary, game progress, settings, and subscription access.
- Provide dictionary, flashcard, quest, capture, streak, and reward features.
- Process purchases, restore purchases, and prevent transaction fraud.
- Respond to support, privacy, and account-deletion requests.
- Protect the Service, enforce our Terms, prevent abuse, and troubleshoot problems.
- Analyze and improve reliability, content, learning features, and user experience.
- Comply with law and protect our rights and the rights of others.
3. Legal bases for processing
Where laws such as the European Economic Area, United Kingdom, or Swiss data protection laws require a legal basis, we rely on one or more of the following:
- Contract: processing needed to provide the Service you request.
- Legitimate interests: operating, securing, supporting, and improving Yomoyo, provided those interests are not overridden by your rights.
- Legal obligation: complying with applicable legal requirements.
- Consent: where we specifically ask for and rely on your consent.
4. How we disclose information
We may disclose information to the following recipients:
- Google Firebase and Google Cloud: for anonymous and email-and-password authentication, database hosting, cloud functions, website delivery, and related infrastructure.
- RevenueCat: for subscription entitlement, purchase, and restoration management.
- Apple and Google: when you obtain the app or make an in-app purchase through their stores. Their handling of information is governed by their own policies.
- Vendors and professional advisers: when reasonably necessary to operate, secure, support, or advise the Service and subject to appropriate obligations.
- Legal and safety recipients: when we reasonably believe disclosure is required by law, legal process, safety concerns, fraud prevention, or protection of rights.
- Business transfers: in connection with a merger, financing, acquisition, reorganization, bankruptcy, or sale of assets, subject to applicable law.
We do not sell personal information. We do not share personal information for cross-context behavioral advertising or targeted advertising, and we do not use learning activity to serve third-party ads.
5. Data retention
We generally retain account identifiers, connected email addresses, authentication records, settings, learning activity, and progress for as long as your anonymous or connected account remains active and as needed to provide the Service. We may retain limited records longer when reasonably necessary to comply with law, maintain financial or transaction records, resolve disputes, prevent fraud, enforce agreements, or establish legal claims.
When data is deleted, it may remain for a limited period in backups or service-provider systems before being overwritten in accordance with their retention processes. For example, Firebase states that certain deleted authentication information may take up to 180 days to be removed from live and backup systems.
6. Your choices and rights
Depending on where you live, you may have the right to request access to, correction of, deletion of, or a portable copy of your information; object to or restrict certain processing; withdraw consent; or appeal a decision about your request. You may also have the right to complain to your local data-protection authority.
Yomoyo does not sell personal information, so there is no sale from which you need to opt out. We will not discriminate against you for exercising an applicable privacy right.
To make a privacy request, email support@yomoyo.app. To request deletion, you may also visit Delete account. If your account is connected, we may use its email address and information from the app to verify your request. For an anonymous account, we may need information from the app or device to verify that the request concerns your account. Never send us your password.
7. International data transfers
Yomoyo is operated from the United States. Our providers may process and store information in the United States and other countries where they or their subprocessors operate. These countries may have data-protection laws different from those where you live. Where required, we use legally recognized transfer mechanisms and contractual protections.
8. Security
We use reasonable administrative, technical, and organizational safeguards designed to protect information, including authenticated access controls and encrypted network transport provided by our infrastructure providers. No system is completely secure, and we cannot guarantee that information will never be accessed, altered, lost, or disclosed without authorization. If you connect an account, you are responsible for keeping its password confidential and for securing the devices and email account you use with it.
9. Children
Yomoyo is not directed to children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child under 13 has provided information through the Service, contact us so we can take appropriate action. Users who are not old enough to consent to these terms under local law should use Yomoyo only with permission from a parent or legal guardian.
10. Third-party services and content
The Service may link to third-party services or contain content and data licensed from third parties. This Policy does not govern a third party's own independent privacy practices. We encourage you to review the policies of Apple, Google, RevenueCat, and any linked service.
11. Changes to this Policy
We may update this Policy as the Service or legal requirements change. We will post the revised Policy here and update the date above. If a change is material, we will provide additional notice when required by law.
12. Contact us
For questions or requests concerning this Policy or Yomoyo's privacy practices, contact Yomoyo LLC at support@yomoyo.app.