Privacy Policy
Updated October 14, 2026
A small app, with data kept close
City Interchange is designed for exploring road interchanges and creating your own designs. The current app does not require an account and does not include advertising, third-party analytics or tracking SDKs.
What stays on your device
Your current road design is saved in the app’s local storage. Generated model files may be cached on the device so the app can reopen them. The app does not send these designs or models to a developer-operated service.
System backups and diagnostics
Your device or operating system may include app data in system backups, depending on your settings. Apple may also process App Store, purchase or diagnostic information under its own policies and your settings. These system services are separate from the app; this policy does not promise that app data can never leave your device.
This website
This site does not use advertising cookies, browser storage or analytics scripts. The web server or hosting provider may process necessary access logs, such as IP address, requested page, time, browser information and response status, to deliver and secure the site. Do not send private information in a page URL.
When you contact us
If you email us, we receive your email address and any content you choose to send. We use that information to respond and investigate the issue. Please avoid including sensitive data unless it is needed for your request.
Managing your data
The current app has no cloud account to delete. You can remove locally stored app data by deleting the app. System backups and diagnostics are managed through your device and Apple account settings. Contact us if you have a privacy question about information you sent by email.
Changes and contact
This policy describes the current app and website. We will update it when relevant behavior changes. Privacy questions: tinuv.yang@gmail.com.