One policy for this website and every app I make: what you create stays with you.
My apps keep what you create on your device. There are no accounts and no sign-in, and nothing you make is sent to me or to a server I run.
Apps that sync use your own private iCloud database through Apple’s CloudKit. Apple stores that data under your Apple ID, and I cannot see it. You can turn iCloud off for any app in your device’s iCloud settings.
No advertising, no analytics, no tracking, and no third-party code that collects data.
When an app asks for access to your photos, files or other apps, that access is used on your device for the feature that asked for it, and for nothing else. You can withdraw it at any time in Settings.
Apple handles payments, subscriptions and refunds. An app reads verified transactions through StoreKit only to unlock what you bought. I never receive your payment details.
When you share or export, what you choose goes only where you send it.
If you choose to share analytics with app developers in your device settings, Apple may send me anonymous crash reports and usage statistics.
zixiangzhang.com is a static site with no accounts, forms, analytics or cookies of its own. Its host, Vercel, keeps standard request logs for security and reliability. Sites linked from here follow their own policies.
If you email me, I use your address and message only to reply.
If an app’s practices change, this page is updated before that version is released.