Privacy Policy

1. Information we collect

When you use the Service we collect or generate the following: 1) Guestbook: the name, contact details and message you submit, plus an irreversible hash of the submitting IP address and the submission time, used to prevent abuse. 2) OS-Link app: a device identifier generated by the app itself (which you can reset at any time), your phone brand and model, Android version and app version; after you successfully configure a camera we also receive that camera's brand, model, firmware version, protocol and device name (OSD overlay text). 3) Server logs: the source IP address, request time and client type of requests to our server, used for API authentication, rate limiting and abuse prevention. 4) Diagnostic logs: if you choose to upload a runtime log from the app, the log body and the device description it contains are submitted to us. We do not collect your contacts, SMS, photos or precise location, and we do not read non-resettable hardware identifiers such as IMEI.

2. How we use information

Information is used only to reply to your feedback, follow up on vendor integration requests and improve the product. We do not use it for unrelated purposes.

3. Storage and security

Data is stored on our own servers located in mainland China; database and file access require admin authentication, and the site is served over HTTPS. Uploaded runtime logs are kept for 30 days by default and deleted automatically afterwards; guestbook entries and app statistics remain in our database and will be deleted at your request. We apply reasonable technical and organisational measures, but no system is absolutely secure.

4. Sharing

We do not share, transfer or disclose your personal information to third parties except where required by law or with your consent, and the Service embeds no third-party advertising or analytics SDK. IP geolocation is performed on our own server with a bundled offline IP database (DB-IP Lite); the lookup happens entirely inside our server and your IP address is never sent to the database provider or to any external service. If we ever add a third-party service, we will update this policy and ask for your consent first.

5. Your rights

You may request access, correction or deletion of your message through the contact channels below, and we will handle it promptly.

6. Contact us

The Service is operated by Shenzhen KuaiQi Technology Co., Ltd. (深圳市快七科技有限公司), ICP filing No. 粤ICP备19141242号-1. For any question, comment or complaint about this policy, contact us at 86799@qq.com or +86 0752-2883756 (WeChat: QQ_86799). If our contact details change, the latest ones are shown on the About page.

7. Account and app-version information

When you register, log in, reset a password or validate a session, we receive your phone number or email address, a password hash (never the plaintext password), a token hash, the registration/login device identifier, the app package name, app version, build channel (official/store), installer source (which app store installed the app) and Android version. We use this information to authenticate you, keep sessions secure, decide whether your app version is still supported, and investigate abuse. We do not use it for advertising.

8. Account deletion and minimum supported version

You can delete your account at any time at https://os-link.com/privacy.php?doc=delete without logging in to the app. Deletion removes your account, login tokens and referral binding; SMS/email audit logs may be retained as required by law. To keep the Service secure and compatible, we may set a minimum supported app version; if your version is lower, login and online services may be refused and you will be asked to update. We announce this in the app in advance, and refusing an update does not by itself delete your account or data.