One-sentence principles, resurfaced on your Lock Screen. 一句话原则,随机浮现在你的锁屏上。
PRIVACY POLICY · ENGLISH
Privacy Policy
Effective date: October 19, 2026 · Applies to the iOS app “Principles” (原则) by Sapjax
Short version
We do not collect, transmit, or sell any of your personal data. There is no account, no analytics, no advertising, and no third-party tracking SDKs in this app.
Where your data lives
On this device. Principles you write are stored locally in the app's database.
Your own iCloud (optional). If you enable iCloud, your principles sync privately through Apple's CloudKit service inside your personal iCloud account. We never see this data; it is end-to-end between your devices and Apple's servers under your Apple ID.
What we never do
We do not collect your name, email, location, contacts, or usage analytics.
We do not transmit your principles to any server operated by us.
We do not include advertising or third-party data-collection SDKs.
Deletion
Delete a principle in the app to remove it from the device. Data mirrored to your personal iCloud is managed by Apple under your Apple ID and is removed when deleted from the app and iCloud. Uninstalling the app removes local data.
If this app ever introduces features that change the above (for example, an opt-in public feed), this policy will be updated and re-date-stamped before that feature ships.
EN: Sign in to iCloud in iOS Settings; Principles syncs privately via your personal iCloud (Settings → sign-in status is shown in the app). 简体:在 iOS 设置中登录 iCloud 即可;原则通过你个人的 iCloud 私密同步(App 设置页会显示同步状态)。 繁體:在 iOS 設定中登入 iCloud 即可;原則透過你個人的 iCloud 私密同步(App 設定頁會顯示同步狀態)。