Terms of service

Last updated October 7, 2026

These terms are an agreement between you and Winding AI Inc., doing business as Winding Labs ("Tumbly", "we", "us"), for using the Tumbly apps, the back-seat screen and tumbly.ai (the "Service"). Please read them with our privacy policy and Children's Privacy Notice.

1. Accounts are for grown-ups

You must be 18 or older (or the age of majority where you live) to create a Tumbly account, buy a subscription or accept these terms. You may create profiles for children in your care, you agree to these terms on their behalf, and you are responsible for how they use the Service. Keep your sign-in and optional parent PIN private, and tell us if you think someone else has access.

2. Driving safety

Follow all traffic laws and local rules about phones and screens in vehicles, including rules about screens visible to the driver. Stories describe real places for fun and learning. Don't rely on Tumbly for directions, road conditions, or safety information, and never stop or change your route because of a story. Supervising children in the car is always the adult's responsibility.

3. Subscriptions and auto-renewal

• Free plan: pre-made stories and a small daily number of live AI questions and stories.
• Tumbly Family costs $7.99 per month or $59.99 per year (U.S. prices, plus any tax; prices in other countries are shown before you buy).
• Your subscription renews automatically at the same price and for the same length (monthly or yearly) until you cancel. You're charged at the start of each period. If you buy through Apple or Google, the charge goes to your app store account and renews unless auto-renew is turned off at least 24 hours before the end of the current period.
• Free trials: if we offer one, we'll show its length before you start. Unless you cancel at least 24 hours before the trial ends, it converts to a paid subscription and you'll be charged the price shown.
• Price changes: we'll tell you in advance and, where required, ask you to agree. Changes apply from your next renewal; you can cancel before then.

4. Cancellation

You can cancel any time, and it's as easy as signing up:

• iPhone or iPad: Settings → your name → Subscriptions → Tumbly → Cancel Subscription.
• Android: Google Play → profile icon → Payments & subscriptions → Subscriptions → Tumbly → Cancel.
• Web (Stripe): in the app, Grown-ups → Plan → Manage subscription → Cancel. Or email support@tumbly.ai.

Cancellation stops future renewals. Your family keeps the paid features until the end of the period you've already paid for. Deleting the app or your Tumbly account does not cancel an App Store or Google Play subscription.

5. Refunds

• Apple and Google purchases: refunds are handled by the store under its policies. Request one at reportaproblem.apple.com or through Google Play's order history. We can't issue refunds for store purchases ourselves.
• Web purchases: if you're not happy, email support@tumbly.ai within 14 days of a charge and we'll refund it. After that, payments are non-refundable except where the law requires.

6. AI-generated content

Some stories, pictures, voices and answers in Tumbly are made with AI. We design it for kids: answers are short and filtered for age-appropriateness, stories are fact-checked against sources before they're published, and children can't chat freely with the AI. Even so, AI can be wrong, incomplete or unexpected. AI content is for entertainment and learning, not professional, medical, safety or navigation advice. Please listen along with your kids and report anything that seems wrong or inappropriate to support@tumbly.ai; we review every report. You can turn off live AI features in the grown-up area.

7. Acceptable use

Don't misuse the Service: no attempts to break, overload, scrape or reverse-engineer it, to get around limits or parent checks, to access other families' data or back-seat rooms, to make the AI produce harmful content, or to use it for anything unlawful. The Service is for your family's personal, non-commercial use.

8. Our content

Tumbly, RoadStory, our stories, art, voices and software belong to us or our licensors. We give you a personal, revocable, non-transferable license to use the Service for your family's non-commercial enjoyment while you follow these terms.

9. Disclaimers and limits of liability

The Service is provided "as is" and "as available." To the extent the law allows, we disclaim implied warranties, and we're not liable for indirect, incidental or consequential damages, or for anything that happens because someone used the Service while driving. Our total liability for any claim is limited to the amount you paid us in the 12 months before the claim (or $50 if you haven't paid). Some places don't allow these limits, so they may not apply to you, and nothing here limits rights you have under consumer law that can't be waived.

10. Ending use

You can stop using Tumbly and delete your account at any time. We may suspend or end access if you break these terms, with notice where reasonable. If we shut down a paid feature, we'll give prorated refunds for web purchases.

11. Changes, disputes and law

We may update these terms and will post changes here with a new date. For material changes we'll notify parents by email or in the app before they apply. California law governs these terms, except where your local consumer law says otherwise. Before filing a claim, please email hello@tumbly.ai so we can try to fix it.

12. App stores

If you got Tumbly from Apple's App Store, these terms are between you and us, not Apple. Apple isn't responsible for the app or its support, has no warranty obligation beyond refunding the purchase price under its policies, and is a third-party beneficiary of these terms. The same applies to Google Play.

13. Contact

Winding AI Inc. (Winding Labs) · Mill Valley, California, USA · hello@tumbly.ai · Support: support@tumbly.ai