Privacy Policy

CloudEx Inc. ("we", "us", or "our") operates the "AI Interpreter" app (the "Service"). This Privacy Policy explains what information we collect, how we use it, and the choices available to you. By using the Service, you are deemed to have agreed to the practices described in this Policy.

1. Our Core Principle

AI Interpreter interprets face-to-face conversations. Your phone's speech recognition turns what you say into text, and when you use an AI feature, that text is sent through our server to an AI provider to be translated. Our server does not keep the text you send or the results it returns, and does not write them to its logs. There is no account and no sign-up. Your conversation history stays on your device.

Features that do not use AI — the phrasebook built into the app, cards to show, the writing board, and your history — work without sending anything to our server.

2. Microphone, Speech Recognition and Read-Aloud

  • Microphone: Used only while you have pressed the microphone button, to turn your voice into text. The app does not record or save audio, and never sends audio to our server.
  • Speech recognition: The conversion from voice to text is done by the speech recognition service on your phone (on most phones, Google's). That service may send your voice to its provider over the internet to recognize it, under the provider's own privacy policy. We do not receive the audio.
  • Read-aloud: Translations are read aloud by the text-to-speech engine on your phone. Depending on the engine you use, it may connect to the internet.

3. What We Send for AI Processing

Only when you use an AI feature, the app sends the following to our server, encrypted (HTTPS):

  • The text to process: what you said or typed, and up to the last few lines of the conversation so that the translation follows its context
  • How to translate: the two languages, and the scene and politeness you chose
  • Glossary terms: only the entries from your glossary that appear in the text
  • Reply suggestions: when suggestions are on, the items you saved in "About me" (first and last name, gender, nationality, job, home and where you are staying), so that the suggested replies can answer questions about you. Our server replaces where you are staying with a placeholder before passing the request to the AI provider and puts it back into the result, so the AI provider does not receive where you are staying. Your name may be passed to the AI provider so that the translation keeps it in the letters you saved
  • Practice, summaries and phrases: the situation you practice and the lines of that practice, the lines of a conversation you summarize, or the description of the phrases you want

Where it goes: Our server runs on Google Cloud (Firebase Cloud Functions, Tokyo region). It checks the request and passes it to our AI provider, Anthropic, PBC (the Claude API), which generates the result. The app never sends prompts or keys of its own; the AI provider's key is kept only on our server. Under Anthropic's commercial terms, data sent through its API is not used to train its models.

What is not kept: Our server keeps neither the text you send nor the results, and does not write them to its logs. The only exception is a result you choose to report in the app (Section 4).

4. Information Our Server Keeps

  • A hash of your device identifier: A one-way hash (SHA-256) of your device's Android ID combined with a fixed value. We use it to make sure the free trial is used once per device and to count usage. We do not keep the Android ID itself.
  • Usage counts: When the free trial started, how many times it has been used, and this month's usage of the subscription (shown in the app as a percentage).
  • Subscription status: The plan, its state and its expiry date, which our server confirms with Google Play using the purchase token the app sends. The record is keyed by a hash of the purchase token. We never receive payment information such as card numbers.
  • Anonymous sign-in and app verification: The app signs in to Firebase Authentication anonymously (no name or email address) and uses Firebase App Check with Google Play Integrity so that our server only answers the genuine app. The anonymous user ID is used for this and for limiting how many requests can be made per minute and per day.
  • Call records: For each AI request, the kind of task, the plan, the model, the amount processed and its cost, and the time — without any text. They are deleted after 14 days. Daily totals of these numbers are kept as statistics.
  • Results you report: When you report a translation in the app, the text and the result you reported, the reason and any note you add, the device hash and the app version are sent to us so that we can review it and improve the Service.

5. Other Information Collected Automatically

  • Anonymous crash reports: Via Firebase Crashlytics. When the app crashes, we collect the stack trace, device model, OS version, and app version. This does not include what you said or the translations.
  • List of our other apps: To show our other apps, the app downloads their names, descriptions, and icons from our content server (static files hosted on Cloudflare Pages). The request contains no personal data from the app. As with any request to a web server, the server receives your device's IP address as part of the connection.

The app does not use an advertising ID and does not collect analytics about how you use it.

6. Information Stored Only on Your Device

  • Conversation history and favorites: The lines you spoke, their translations, back-translations and summaries.
  • Things you made with AI: Phrases made with AI and phrasebook translations into other languages.
  • Glossary and "About me": Stored on your device. They are sent only as described in Section 3, and only the parts needed for each request.
  • App settings: Languages, scene, politeness, read-aloud and similar settings.
  • Android backup: If backup is turned on in your device settings, Android may include the app's data in the backup it saves to your own Google account, and may copy it to a new phone when you transfer your data. This is handled by Android; we have no access to it.
  • When you uninstall: Uninstalling the app or clearing its data deletes everything above from your device.

7. Information We Explicitly Do Not Collect

  • Audio recordings of your voice
  • The text of your conversations or the AI results (except results you choose to report)
  • Your email address, phone number, or contacts (the app has no account or sign-up)
  • Your location
  • The contents of your screen or of other apps

8. Permissions the App Requests and Their Purposes

  • Microphone (RECORD_AUDIO) — Turns your voice into text through your phone's speech recognition service. Used only while you have pressed the microphone button. The app does not record.
  • Internet (INTERNET / ACCESS_NETWORK_STATE) — Sends requests for the AI features, checks the subscription, sends crash reports, and downloads the list of our other apps. The phrasebook, cards and writing board work without a connection.
  • Google Play Billing (BILLING) — Lets you subscribe to Premium through Google Play.

9. How We Use Information

The limited information we collect is used only for the following purposes:

  • Providing the AI features you request
  • Managing the free trial and the subscription, and limiting usage to protect the Service from abuse
  • Diagnosing and fixing crashes, and improving translations from the results you report
  • Responding to support inquiries
  • Complying with applicable laws

10. Third-Party Services

AI Interpreter uses the following third-party services. Each service has its own privacy policy.

  • Google Cloud / Firebase (Google LLC) — Cloud Functions and Firestore for our server, Firebase Authentication (anonymous), Firebase App Check with Play Integrity, and Firebase Crashlytics
  • Anthropic, PBC — the Claude API that generates translations and other AI results
  • Google Play Billing and the Google Play Developer API (Google LLC) — the Premium subscription and its verification; payment is completed on Google Play
  • Google Play In-App Review and In-App Updates (Google LLC) — let you rate the app and install updates without leaving it
  • Your phone's speech recognition and text-to-speech services — chosen in your phone's settings, under their providers' policies
  • Cloudflare Pages (Cloudflare, Inc.) — hosts the static list of our other apps

AI Interpreter does not display ads within the app and does not share your data with advertising networks.

11. Data Retention

  • Text you send for AI processing and the results: not kept on our server.
  • Call records: deleted after 14 days.
  • The device hash and its trial and usage counts: kept so that the free trial is used once per device.
  • Subscription status: kept while needed to provide and verify the subscription.
  • Results you report: kept while needed to review them and improve the Service, and deleted on request.
  • Crash reports: retained for 90 days, then deleted.
  • Data on your device: kept until you delete it, uninstall the app, or clear the app's data.

12. International Data Transfers

We are based in Japan, and our server runs in Google Cloud's Tokyo region. Our AI provider, Anthropic, may process requests in the United States. Crash diagnostics and the list of our other apps may be processed in various countries. When you use the Service, the minimal information described above may be processed outside your country of residence under standard contractual safeguards.

13. Your Rights

Depending on where you reside (e.g., the EEA, UK, California, Japan), you may have the right to request access to, correction of, or deletion of the limited information we hold. You can:

  • Delete conversations, favorites, glossary entries and "About me" in the app at any time, or uninstall the app or clear its data to erase everything stored on your device
  • Turn off reply suggestions, or withdraw the microphone permission in your device settings at any time
  • Contact us at the address below to make a request regarding the information we hold

14. Children's Privacy

AI Interpreter is not directed to children under the age of 13 (or the minimum age applicable in your region). If we inadvertently collect information from such a child, we will delete it promptly upon being contacted.

15. Changes to This Policy

This Privacy Policy may be updated from time to time. The latest version is always published at this URL together with its effective date. We will also notify you within the app of significant changes as appropriate.

16. Contact

For questions about privacy, data requests, or to report concerns, please email us at .

CloudEx Inc. (Japan)

Effective Date: November 2, 2026