Terms

The short version: use DTwin to learn and build, keep your account to yourself, and don't take the apps apart to copy them.

Using DTwin

DTwin and Part Studio are free to start, with no installation. Some machines, Part Studio, and lessons past the first in each group need DTwin Pro, with a free 7-day trial once per email address. A school, college or company can give its people DTwin through an organisation: joining one doesn't change these terms.

Your account

An account is for one person. Sign in on a second device and the first is signed out (two devices for an organisation's instructors) — it isn't a way to split one person's Pro across several people, and we may suspend an account used that way. Keep your password to yourself, and tell us if you think someone else has it.

Payment and cancelling

Pro runs for the period you bought (a week or a month) and doesn't renew itself; there's nothing to cancel, because nothing repeats without you starting it again. Payments are handled by our payment provider, Snippe — we never see a card number or a mobile money PIN. Each one is shown on the Billing page with its own invoice.

What's yours, what's ours

A part, assembly or project you build is yours. DTwin's own software — the apps, their source, the built-in parts library, the lessons and the machines that come with DTwin — stays ours, and using the apps doesn't give you a copy of it to keep, resell or build a competing product from.

What not to do

• Don't try to get around sign-in, Pro, or any other check the apps make — including reading, copying, decompiling or reverse engineering the compiled parts of the apps that exist specifically to make that harder.
• Don't take the apps' own code, their built-in parts library, or their lessons, and redistribute, resell or publish them as your own.
• Don't use DTwin to attack, scan or overload our servers or anyone else's, or to send spam.
• A part you design and export is yours to use in your own projects, including inside a business; it's not yours to extract DTwin's own software from, or to pass off as a product of your own.

We can suspend or close an account that breaks these, without a refund for time already used.

No warranty

DTwin is a training and design tool, not a certified safety system: don't use what you build in it as the final word on whether a real machine or program is safe. We give the apps as they are, without a guarantee they're fault-free or available every moment, and we aren't liable for what a program you wrote in DTwin, or a part you built in Part Studio, does once it leaves these apps.

If this changes

We may update these terms as the apps change. A real change will move the date below; keep using DTwin after that and the new terms apply to you. Questions: hello@getdtwin.com.

Last updated 8 November 2026.