Privacy Policy

1. Where your circuits are stored

• On your device: circuits, groups and settings are stored locally. The developer cannot see them.
• iCloud (Apple app only): if iCloud is turned on for this app in Settings, your circuits sync to the private iCloud storage of your own Apple Account so your other devices can use them. Apple holds this data; the developer cannot access it. You can manage or delete it in Settings → Apple Account → iCloud.
• Web version: circuits are stored in your browser's local storage. Clearing browser data deletes them, so use "Back up all" to export a copy from time to time.

2. Share links

When you create a share link, the circuit is compressed into the part of the link after the # sign. By web standards this part is never sent to the server; it is decoded only in the browser or app that opens the link. You decide who receives the link. Anyone with the link can see the circuit in it, so please do not put personal information in circuit titles or notes.

3. Membership (Apple In-App Purchase)

Purchases, renewals and refunds are handled by Apple's App Store. The developer never receives your name, Apple Account or payment details. The app only asks the system whether you are a member and when the membership expires, to decide which features to unlock. To cancel auto-renewal, go to Settings → Apple Account → Subscriptions.

4. What we do not do

• No sign-up or login. We do not collect names, phone numbers, email addresses, location, contacts or photos (except contact details you choose to add to feedback).
• No third-party analytics, advertising or tracking SDKs. We do not track you across apps or websites.
• The app does not request camera, microphone or location permissions. Photo library access is used only to save images you export, and only when you ask.

5. Server logs

Like any website, our server automatically keeps standard access logs (IP address, time, browser type, page requested) when you use the web version, when the app loads the Featured gallery from the server, or when you send feedback. These logs are used only to keep the service secure and fix problems. They are not used to identify you, are not shared with third parties, and are deleted regularly. Apart from this (and feedback, see section 6), everything else in the app runs on your device without contacting this server.

6. Sending feedback

When you tap "Send" in Settings → Send Feedback, the following is sent to our server and forwarded to the developer by email, used only to fix problems and reply to you:

• What you write, and optional contact details (you can send without them);
• The current circuit: only if you tick "Attach the current circuit", and only the one that is open;
• Recent error messages: errors that occur while the app runs are kept in memory only, cleared when the app closes, and never uploaded automatically. They are sent only if you tick that box;
• App version, device model (browser user agent) and interface language.

Feedback records do not store your IP address (for server access logs, see section 5) and are not shared with third parties. To have your feedback deleted, email us. Nothing is uploaded unless you tap "Send".

7. Children

The app is suitable for students learning electronics. Apart from feedback a user chooses to send, we collect no personal information. We suggest children leave out personal contact details when sending feedback and ask a parent to get in touch instead. If a parent finds personal information written into a child's circuit, simply delete that circuit on the device or in iCloud.

8. Changes to this policy

If future features need to handle personal information (for example, a community feature that requires accounts), we will update this policy first, tell you clearly inside the app, and ask for your consent again where required.

9. Contact

Developer: Fan Zhiyi (individual developer)
Email: saviteachingassistant@outlook.com