Terms of use
Last updated: 29 October 2026
Educational content
The machines, figures and procedures in the app are simplified teaching models that explain the principles. They are not a substitute for the manufacturer's manual, for the safety rules of a work site, or for hands-on training under a qualified supervisor.
Before any maintenance on a real machine: isolate and lock out the power (lockout/tagout), release stored pressure and heat, and follow your site's instructions. Do not attempt to repair elevators, refrigerant circuits or pressurised systems without a licence.
Certificates
A certificate of completion shows that you passed a workshop's test in the app. It is not a professional qualification or a licence to work, and it is not issued by a school or an official body.
Use
You may use the app to learn or to teach others. You may not copy, resell or modify the app or its content, or unlock its paid features.
The plan
- Pro is a one-time payment for life through Google Play; it does not renew, and includes the workshops of coming versions.
- Refunds follow Google Play's policy.
- “Restore purchases” in the app brings your plan back on a new device with the same Google account.
Liability
The app is provided “as is”. We are not liable for any damage, loss or decision based on its content. In any case our liability is limited to what you paid in the last 12 months.
Changes
We may update the app and these terms; using the app after an update means you accept them. These terms are governed by the laws of the country where the developer resides, without taking away any protection the consumer law of your own country gives you.