Privacy Policy
Last updated: October 2026
Introduction
JisokuDict ("the App") is a Japanese-English dictionary application. This Privacy Policy explains how we collect, use, and protect your information when you use the App or the JisokuDict Support service at jisoku.app/support.
We are committed to protecting your privacy and being transparent about our data practices.
Information We Collect
Local Data (Stored on Your Device)
The App stores the following data locally on your device:
- Search History - Your recent dictionary searches to provide quick access to previous lookups
- Favorites - Words and kanji you mark as favorites for easy reference
This data is stored only on your device and is not transmitted to our servers or any third party.
iCloud Sync
If you are signed into iCloud, your favorites, flashcards, notes, study history and search history may be synced across your devices using Apple's iCloud service. This data is protected by Apple's privacy policies and is not accessible to us.
Advertising Data
The App uses Google AdMob to display advertisements. AdMob may collect:
- Device identifiers (such as advertising ID)
- General location data (country/region level)
- App usage and interaction data
- Ad viewing and interaction data
This data is collected by Google and is subject to Google's Privacy Policy.
Support Messages (jisoku.app/support)
When you send a message through the contact form on this website, we store the following in our database (SQLite, hosted on Railway with a persistent volume):
- The topic and the message you write
- Your device and app version, if you choose to enter them
- Your email address, only if you choose to enter it
The email field is optional. If you leave it, we use it only to reply to that message. We never add it to a mailing list or share it. You don't need an account, and the form sets no cookies.
Messages are private. Only the developer can read them, and they are never published.
Subprocessors
- Cloudflare Turnstile - bot protection on the contact form. Cloudflare may collect browser signals according to their policy.
- Railway - hosts the application and database.
Retention
- Messages are retained for 2 years, then purged. This includes tickets sent through the earlier ticket system on this site.
- You can ask us to delete your messages sooner by sending a request through the contact form.
No third-party analytics or tracking is loaded on the support pages.
How We Use Your Information
Local Data: Your search history and favorites are used solely to improve your experience within the App by providing quick access to your recent and saved items.
Support Messages: Used to fix bugs, answer your questions and, if you left an email, reply to you.
Advertising Data: Data collected by AdMob is used to serve relevant advertisements and to measure ad performance.
Data Sharing
We do not sell, trade, or transfer your personal information to third parties beyond the subprocessors listed above (which act on our behalf to operate the service).
Outside the App, the only third-party service that receives device data is Google AdMob for advertising purposes.
Your Rights
You have the right to:
- Access your data stored in the App (visible in search history and favorites)
- Delete your search history and favorites at any time
- Request access to or deletion of your support messages through the contact form
- Opt out of personalized advertising through your device settings
To limit ad tracking on iOS, go to Settings > Privacy & Security > Tracking.
Children's Privacy
The App is not directed at children under 13. We do not knowingly collect personal information from children under 13.
Third-Party Links
The App may contain links to external websites (such as the EDRDG dictionary project). We are not responsible for the privacy practices of these external sites.
Changes to This Policy
We may update this Privacy Policy from time to time. Any changes will be reflected in the App with an updated revision date.