Last updated: 24 October 2026. Applies to PhysicsLab (物理实验室) for iPad, bundle ID com.marzer.physicslab.
The app is provided by the developer listed on its App Store product page. For privacy questions and support, contact [email protected].
1. Experiments and preferences on your device
You do not need to create a separate PhysicsLab account. Experiment documents, apparatus and connections, measurements, observations, notes, conclusions, course and challenge progress, and recovery backups are stored in the app's storage on your device. Appearance, language and reduced-motion settings are stored locally or managed by the system, according to the options the app provides. This information supports displaying, calculating, editing, saving and continuing experiments. It is not automatically uploaded to the developer.
Built-in courses, apparatus guides and the experiment workspace are included with the app. Experiment calculations run on your device. The current version has no developer-operated cloud sync service, advertising, cross-app tracking or third-party analytics upload SDK. It does not request access to your camera, microphone, location or contacts.
2. Apple purchases, membership and offers
Monthly subscriptions and lifetime purchases are processed through Apple's App Store and StoreKit. The app reads product information, prices, verified transactions and subscription status supplied by Apple to determine membership access, restore purchases and handle expiration or revocation. Transaction information may include product identifiers, purchase and expiration dates, and renewal or revocation status. It is not used for advertising or cross-app tracking.
Loading prices, making or restoring purchases, and checking free-trial eligibility may require a connection to Apple services. If the monthly product includes a first-month-free introductory offer, the app displays it according to the offer terms and account eligibility returned by Apple. Finding an offer does not itself grant membership.
Apple handles payment and Apple Account authentication. The app does not receive your full payment-card details, payment password or Apple Account password, and support will not ask you to email this information. Purchase verification does not require uploading your experiment content to the developer. The current version has no developer-operated transaction-verification or purchase-record server.
Apple handles its account, payment and transaction information, and data Apple collects, under its own policies. See Apple's App Store & Privacy information. Use Apple's available controls to cancel renewal or request a refund. Clearing local experiment data does not cancel a subscription or delete Apple's purchase records. Membership expiration or revocation does not automatically delete local experiment data.
3. When you save, share or contact support
If you choose to save an experiment image, export a recovery file or use system sharing, the selected file may contain experiment states, parameters or content you entered. Check it before sharing. Your chosen destination app or service receives and handles it according to your action. Deleting data in PhysicsLab does not delete copies already exported or shared elsewhere.
Opening a policy, terms or support link may take you to an external website or mail app. Those services handle visits and email under their own policies. If you email [email protected], we receive the address, message and attachments you choose to send and use them to respond to and handle your request. Do not send unnecessary personal information, passwords, payment details or children's identity information.
4. Retention and deletion
Local experiment data remains until you use the app's deletion or clearing controls, or remove the app and its associated local data through the system. Experiments in Recently Deleted may still be recoverable. Read the confirmation before clearing data. Preferences such as appearance are managed separately from experiment data; clearing experiments does not clear every system setting.
Deleting data in the app does not affect system backups you keep, external file copies, emails already sent or Apple's transaction records. Device and Apple Account settings and Apple's policies govern system backups and diagnostics. PhysicsLab does not operate those services.
5. Students and minors
Experiment features do not ask students to provide names, schools, ages, contact details or a separate app account, and experiment data is not used for advertising. Minors should use the app with a parent or teacher's guidance. A parent or guardian should handle purchases under Apple's account and purchase-management rules. Avoid putting identifying information in experiment notes or shared files.
6. Contact and policy updates
For questions about this policy, or requests to access, correct or delete personal information you voluntarily sent to support, contact [email protected]. You primarily manage on-device experiment data through the app or system. Use a device lock and appropriate backups.
If app functionality or data handling changes materially, we will update this page and its date and, where appropriate, explain the change with the app update.