Privacy Policy

MojiOkoshi (hereinafter referred to as "this App" or "this Service") places great importance on the protection of users' personal information. This Privacy Policy (hereinafter referred to as "this Policy") explains what information this Service collects and how it is used and managed.

Article 1 (Information Collected)

This App may collect the following information.

1.1 Information Provided by the User

• Contact information provided when making inquiries (e.g., email address)

1.2 Automatically Collected Information

• Device information (OS version, device model, device ID)
• App Tracking Transparency (ATT) permission status
• Transcription usage statistics (number of transcriptions, audio duration, mode used)
• Advertising identifier (IDFA) - for ad personalization (only with user permission)
• App crash reports and performance data

Note: When High Quality Mode is enabled (see Article 3, Section 3.3), transcription text, language code, and custom dictionary entries are sent to a third-party AI service (Google LLC). Please refer to Articles 3 and 4 for details.

1.3 Information Stored on Device (Not Sent to Servers)

• Recorded audio data (only when the user chooses to save)
• Transcribed text data
• Transcription history (date/time, language, mode, file name, etc.)
• App settings (selected language, save preferences, etc.)

Article 2 (Purpose of Use)

Collected information is used for the following purposes:

• Providing and operating this App
• Providing and improving transcription features
• Responding to user inquiries
• Improving this App and developing new features
• Delivering advertisements and measuring their effectiveness
• Detecting and fixing app issues
• Notifying users of changes to terms, policies, etc. related to this App
• Purposes incidental to the above

Article 3 (Handling of Audio and Transcription Data)

3.1 Data Storage Location

All audio data recorded by this App and transcribed text data are stored only on your device. This data is never sent to or stored on the operator's servers.

3.2 Standard Mode (Offline)

In Standard Mode, transcription is performed on-device using on-device speech recognition. No audio data or transcription data is sent outside the device.

3.3 High Quality Mode (Online) — Data Transmission to Third-Party AI Service

High Quality Mode is an opt-in feature that only operates when the user explicitly enables it in the app's settings screen. When High Quality Mode is enabled, the following processing occurs:

• Audio is first transcribed on the device
• The transcribed text is sent to an external service for text formatting

Details of Data Sent

When High Quality Mode is enabled, the following data is sent to services provided by Google LLC (United States):

• Transcription text (full text): The complete text of the transcription result from on-device speech recognition
• Language code: The current language setting (e.g., "ja", "en-US")
• Custom dictionary entries (optional): Vocabulary rules created by the user (pairs of source words and replacement words)

Audio data itself is never sent.

Data Destination

The above data is processed through the following services:

• Google Cloud Functions (provided by Google LLC): Data relay processing
• Google Vertex AI / Gemini API (provided by Google LLC, model: Gemini 2.5 Flash Lite): Text formatting and proofreading

Endpoint: us-central1-butterfalcon.cloudfunctions.net (US region)

Data Retention and Storage

• Sent data is used only temporarily for text formatting processing
• After processing is complete, data is immediately discarded and is not stored on Google's servers or the operator's servers
• In accordance with Google Vertex AI's terms of service, data sent via the API is not used for Google's model training

User Consent and Control

• High Quality Mode is disabled by default, and data is only sent when the user explicitly enables it in the settings screen
• Users can stop data transmission at any time by disabling High Quality Mode in the settings screen
• When High Quality Mode is disabled, all transcription processing is completed entirely on the device

3.4 Data Deletion

Users can delete recording data and transcription data at any time from the history screen within the app. Deleted data is completely erased and cannot be recovered.

Article 4 (Use of Third-Party Services)

This App uses the following third-party services. These services operate according to their own privacy policies.

4.1 Google AdMob

Used for advertising delivery

Privacy Policy: https://support.google.com/admob/answer/6128543

• Displays banner ads, interstitial ads, and rewarded ads
• Uses identifiers such as IDFA for ad personalization (only with user permission)

4.2 Google Vertex AI / Gemini API (Google LLC)

Used for text formatting in High Quality Mode (via Google Cloud Functions)

Data sent: Transcription text (full text), language code, custom dictionary entries (optional)

Privacy Policy: https://policies.google.com/privacy

Google Cloud Terms of Service: https://cloud.google.com/terms

Google Cloud / Vertex AI Privacy: https://cloud.google.com/terms/cloud-privacy-notice

• Used for improving transcription text quality (formatting and proofreading)
• Data is only sent when the user enables High Quality Mode (opt-in)
• Processed text is not stored and is immediately discarded after processing
• Data sent via the API is not used for Google's model training

4.3 RevenueCat (RevenueCat, Inc.)

Used for in-app purchase (subscription) management

Privacy Policy: https://www.revenuecat.com/privacy

• Used for subscription purchase, management, and restoration
• Processes anonymous app user IDs and purchase information
• No personally identifiable information is sent

4.4 On-Device Speech Recognition

Used in Standard Mode and the initial stage of High Quality Mode

All speech recognition processing is performed on the device, and audio data is never sent externally

Article 4-2 (Consent for Data Sharing with Third-Party AI Service)

In High Quality Mode, this App sends data to Google Vertex AI / Gemini API provided by Google LLC in order to improve the quality of transcription results.

• High Quality Mode is disabled by default. Data is only sent to the third-party service when the user explicitly enables it in the app's settings screen
• Users can disable High Quality Mode at any time from the settings screen. When disabled, no data will be sent to the third-party service thereafter
• Data sent is limited to transcription text, language code, and custom dictionary entries (optional). Audio data is not sent
• Sent data is immediately discarded after processing and is not stored on Google's or the operator's servers

Article 5 (Disclosure of Personal Information to Third Parties)

The operator will not provide personal information to third parties without obtaining the user's prior consent, except in the following cases:

• When required by law
• When necessary for the protection of life, body, or property of a person and it is difficult to obtain the consent of the individual
• When particularly necessary for improving public health or promoting the sound development of children and it is difficult to obtain the consent of the individual
• When it is necessary to cooperate with a national government organization, a local government body, or an entity entrusted by either in executing affairs prescribed by law, and obtaining the individual's consent may impede the execution of such affairs

Article 6 (International Data Transfers)

When using High Quality Mode, transcription text, language code, and custom dictionary entries are processed through Google Cloud Functions (us-central1 region) and Google Vertex AI operated by Google LLC (United States). However, this data is immediately discarded after processing and is not stored.

Article 7 (Data Retention Period)

7.1 On-Device Data

Recording data and transcription data are retained on the device until the user deletes them within the app or uninstalls the app.

7.2 Advertising-Related Data

Data related to advertising delivery (IDFA, ad interactions, etc.) is managed in accordance with Google AdMob's privacy policy.

7.3 Server-Side Data

No recording data or transcription data is stored on the operator's servers.

• Inquiry history: Up to 3 years (after resolution)
• Usage statistics (anonymized): Up to 1 year

Article 8 (Disclosure of Personal Information)

When requested by an individual to disclose their personal information, the operator will disclose it to the individual without delay. However, if disclosure falls under any of the following cases, the operator may choose not to disclose all or part of the information, and will notify the individual of such decision without delay:

• When there is a risk of harming the life, body, property, or other rights and interests of the individual or a third party
• When there is a risk of significantly impeding the proper execution of the operator's business
• When it would violate other laws or regulations

Note: Since recording data and transcription data are stored only on your device, the operator cannot access this data.

Article 9 (Correction and Deletion of Personal Information)

If a user's personal information held by the operator is incorrect, the user may request correction, addition, or deletion (hereinafter referred to as "correction, etc.") of their personal information through procedures established by the operator.

When the operator receives such a request and determines that it is necessary to respond, the operator will carry out the correction, etc. of the personal information without delay.

Article 10 (Deletion of App Data)

Users can delete data within the app using the following methods:

10.1 Individual Data Deletion

Individual recording data and transcription data can be deleted from the history screen within the app.

10.2 Deletion of All Data

Uninstalling the app will delete all data stored on the device.

10.3 Server-Side Data Deletion

If you wish to delete inquiry history and other data held by the operator, please contact us at support@butterfalcon.com. Data will be deleted within 30 days as a general rule.

Article 11 (Cookies and Similar Technologies)

This App is a native application and does not use web browser cookies. However, the following technologies may be used for advertising delivery:

• Advertising identifier (IDFA): Used for ad personalization (only with user permission)
• UserDefaults: Used to save app settings (on-device only)

Users can opt out of ad personalization by changing the "Tracking" permission in iOS Settings.

Article 12 (Security)

The operator implements appropriate technical and organizational security measures to prevent the loss, misuse, unauthorized access, disclosure, alteration, and destruction of personal information.

• On-device data is protected by iOS's sandbox environment
• Communication with Cloud Functions is encrypted via HTTPS
• API authentication prevents unauthorized access

However, complete security of information transmission over the Internet cannot be guaranteed.

Article 13 (Changes to the Privacy Policy)

The contents of this Policy may be changed without notifying users, except for matters separately stipulated by law or in this Policy.

In the case of significant changes, users will be notified through in-app notifications or announcements on the website. The revised Privacy Policy takes effect from the time it is posted on this website.

Article 14 (Contact Information)

For questions regarding this Policy, requests for disclosure, correction, or deletion of personal information, or other inquiries, please contact us at the following:

Contact: support@butterfalcon.com
Operator: ButterFalcon

Article 15 (Governing Law and Jurisdiction)

The interpretation and application of this Policy shall be governed by the laws of Japan. Any disputes relating to this Policy shall be subject to the exclusive agreed jurisdiction of the Tokyo District Court.