Privacy Policy

Last updated: July 5, 2026

EnDiary ("the App", "we", "us") is developed and operated by ThinksView. This Privacy Policy explains what information we process when you use EnDiary, how we process it, and the choices you have. Our core principle is simple: your diary is yours — writing locally never requires an account, and we do not keep a long-term copy of your diary entries.

1. What we collect and where it's stored

2. How AI processes your diary content

EnDiary's AI features (topic suggestions, writing assistance, corrections, weekly reports) work in two tiers:

• On-device first: on devices that support Apple Intelligence, lightweight features like topic generation and writing suggestions run on-device by default — content never leaves your device.
• Cloud processing: when on-device processing isn't available, or for features that need a more capable model (like full corrections), the diary text you submit for that request is forwarded through our Cloudflare Workers–based service to a third-party AI provider, DeepSeek, for processing.

3. Rewarded video ads (free plan only)

On the free plan, corrections are limited to a small number per month, with your first correction each day free. If you'd like to do a second correction on the same day, you have the option to watch a short rewarded video ad — provided by our advertising partner, Google AdMob — to unlock it. This is entirely optional: you can always just wait until the next day, or subscribe to Plus/Pro for a much higher monthly limit and no ads at all.

• If iOS asks for tracking permission (App Tracking Transparency) and you allow it, AdMob may use your device's advertising identifier (IDFA) to show a more relevant, personalized ad. If you decline, you can still watch a non-personalized ad to unlock the correction — declining never blocks the feature.
• We only receive a one-time confirmation from AdMob that you completed watching an ad, so we can grant the unlock. We never learn what the ad was about or what you did afterward.
• Ads are never shown to Plus or Pro subscribers.

4. How we use information

• Providing core features: topic suggestions, writing assistance, corrections, progress statistics, encrypted backup
• Calculating and enforcing subscription quotas, and preventing abuse
• Showing a rewarded ad and verifying it was watched, only when you choose to unlock an extra correction on the free plan
• Troubleshooting and improving service quality (only through logs and usage metadata that never include diary content)

5. Information sharing

• We never sell your personal information.
• We only send your diary content to our AI provider (DeepSeek) when you actively use a cloud AI feature, and only for that one request.
• Encrypted backups use a third-party object storage service; the provider only ever sees encrypted ciphertext and cannot read the content.
• If you watch a rewarded ad, Google AdMob processes the advertising identifier and ad-interaction data needed to show that ad and confirm completion, under its own privacy policy.
• We may disclose information where required by law or to protect our legitimate rights.

6. Data storage and security

• Diary entries are stored only on your device and in your private iCloud database by default, protected by Apple's iCloud encryption.
• If you enable encrypted cloud backup, content is encrypted on your device with a key only you hold, before it's uploaded; our servers only ever store ciphertext.
• Our server logs never record diary content — only request IDs, task types, token usage, and error codes.

7. Your rights and choices

• You can delete all data associated with your device from our servers at any time, in one tap, from Me → Cloud Data → Delete Cloud Data (statistics, correction results, encrypted backups, subscription linkage). Entries on your device are never affected.
• You can export all of your diary entries at any time from Me → Export All Entries (Markdown format).
• You can change your tracking permission for AdMob at any time in iOS Settings → EnDiary → Tracking.
• Because we don't collect a name, email address, or phone number for registration, EnDiary has no traditional "account" — deleting your cloud data is equivalent to closing an account.

8. Children's privacy

EnDiary is not directed at children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us using the details below so we can address it promptly.

9. International data transfers

The cloud computing, AI, and advertising service providers we use may route processing requests to servers outside your region. We require our partners to handle your information in a manner consistent with this Policy.

10. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be highlighted in the App or on this page — please check the "Last updated" date at the top of this page. Continuing to use EnDiary after an update means you accept the revised policy.