Mitsuki
Privacy Policy — Mitsuki
Effective date: 2026/06/10
App information
- App name
- Mitsuki
- Developer / data controller
- BAOUAB Youssef
- Contact
- ybaouab2@gmail.com
1) Summary
- Offline-first: dictionary lookup, search, OCR, and audio run on-device.
- No ads and no tracking. We never sell personal data or use it for cross-app tracking.
- When you sign in, your cards and progress are stored in Mitsuki Cloud, operated by the developer.
- Most AI runs on-device; heavier AI sends your submitted text to our AI service, which uses OpenAI.
- You control what you add — nothing is uploaded or added to Anki without your action.
2) Information Mitsuki processes
A. Account information
- email address (used to create and sign in to your Mitsuki Cloud account)
- an account identifier issued by our authentication provider (Supabase)
B. Content you create in the app
- searched text (e.g., Japanese words/phrases)
- card fields you generate (expression, reading, definitions, examples, tags)
- deck/profile settings and study progress (SRS state, timestamps)
C. Clipboard data (optional feature)
If you enable Clipboard Prefill, Mitsuki reads the current clipboard while the app is active to prefill a lookup when it appears to contain Japanese text. It is off by default, processed on-device, and never uploaded unless you choose to save a card that includes it.
D. Purchases
If you subscribe to Mitsuki Pro, your subscription status is recorded against your account so Pro features unlock across your devices. Payment is handled entirely by Apple; we never receive your payment details.
3) How your data is used
- perform dictionary lookup and display results (on-device)
- sync your cards and study progress across your devices
- power AI study features you invoke
- enforce fair-use limits on AI requests
- unlock Mitsuki Pro features for subscribers
- provide support (only if you contact us)
We do not use your data for advertising profiling or cross-app tracking.
4) AI processing & sub-processors
On-device AI
Lighter AI tools use Apple's on-device models. The text you submit is processed locally and is not sent off your device.
Cloud AI
For full study-session generation, custom-deck generation, and as a fallback on devices without on-device AI, the text you submit is sent to Mitsuki's AI service (a Supabase Edge Function operated by the developer), which forwards it to OpenAI to generate the result. OpenAI processes the request to return a response. We store only a per-day count of requests for quota enforcement — not the content of your prompts.
Sub-processors
- Supabase — authentication, database, and serverless functions (Mitsuki Cloud).
- OpenAI — generation for cloud AI features.
- Apple — App Store purchases and subscription management.
5) Data sharing & transfers
- We do not sell your personal data.
- Data is shared only with the sub-processors listed above, solely to provide the features you use.
- Cloud data may be processed in regions where our providers operate; transfers occur only to deliver the service.
6) Storage, security, and retention
On-device
Preferences, deck profiles, search history, and cached data are stored locally. Remove them by deleting items in-app or uninstalling the app.
In Mitsuki Cloud
Your account data is protected by per-user row-level access rules so only your account can read it. It persists until you delete it in-app or request account deletion.
Retention
- On-device data persists until you delete it or uninstall the app.
- Cloud data persists until you delete the relevant items or your account.
- Support emails are kept only as long as needed to resolve your request.
7) Your choices and controls
- use Mitsuki offline without signing in to the cloud
- disable Clipboard Prefill at any time in Settings
- delete cards and local data within the app
- request deletion of your Mitsuki Cloud account and data via the contact email
- uninstall the app to remove on-device data
8) Children's privacy
Mitsuki is not directed to children under 13, and we do not knowingly collect personal information from children.
9) Changes to this Privacy Policy
We may update this Privacy Policy to reflect changes in the app or legal requirements. We will update the Effective date above and, where appropriate, note material changes in-app or in release notes.
10) Contact
For any privacy questions or requests, contact: ybaouab2@gmail.com