You get an instant digital download right after checkout. Open the file in your browser and start straight away.

It runs in any modern web browser on a phone, tablet, laptop or desktop. No app or account is needed.

Yes. What you enter is saved in the browser on the device you use, so it’s there when you come back. Entries don’t sync between devices automatically.

Fit counts most, followed by value, weight, extras and brakes suited to your child’s age.

No. It’s a general guide — always check the maker’s chart and test the fit in person.

Refunds are handled under the store’s Refund Policy within 30 days. Because this is a digital product, access is delivered instantly after purchase.