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Machine Elements Support
Find quick answers below. If the problem continues, send a support request with enough detail for us to reproduce it.
Premium purchase is missing
Open Premium and select Restore purchases. Use the same Apple or Google account that completed the purchase, then restart the app if access does not refresh immediately.
A 3D model is dark or does not load
Close and reopen the model, make sure the device has available memory, and update the app to the latest store version. Include the lesson and model name in your report.
Learning progress was reset
Progress is saved locally on the device. Clearing app data, uninstalling the app, or restoring a device without its local app data can remove that progress.
Change the app language
Open Settings and select System default, English, Russian, Spanish, or Greek. System default follows the language configured on your device.
Still need help?
Open a support request
Include the app version, device model, operating-system version, lesson or model name, steps to reproduce the issue, and a screenshot when useful. Do not include passwords, payment-card details, receipts, or other sensitive information.
For refunds, billing-method changes, or subscription cancellation, contact Apple or Google through the store where the purchase was made. For data questions, see our Privacy Policy.