Terms of Sale

1. Purpose

These terms govern the sale of the ChronoTwin Pro subscription, purchased either on chronotwin.app (payment via Stripe) or in the iOS app (in-app purchase managed by Apple). ChronoTwin is published by Marie Bianchi, sole trader (SIRET: [To be completed]).

2. Pro service

The Pro subscription unlocks advanced features: Travel Assistant (jetlag plans), Cadence (rotating shifts), cloud AI tips and long-term trends. Core features (Twin, Today, 7–14 day forecast) remain free.

3. Price and payment

Prices are shown in euros, all taxes included, on the Pro page at the time of purchase. On the web, payment is processed by Stripe; on iOS, by Apple. We do not store or process your payment details.

4. Duration, renewal and cancellation

The subscription is taken out for the chosen period (monthly or annual) and renews automatically unless cancelled. You can cancel at any time: on the web via the management link provided after purchase (Stripe portal), on iOS via your Apple ID settings. Cancellation takes effect at the end of the current period; no pro-rata refund is due, unless otherwise required by law.

5. Right of withdrawal

In accordance with Articles L221-18 et seq. of the French Consumer Code, you have 14 days from the purchase date to exercise your right of withdrawal, without having to give any reason. How this right is handled depends on the purchase channel.

5.1 Web purchase (Stripe payment)

To exercise your withdrawal, email support@chronotwin.app stating your wish to withdraw, the purchase date and the email address used. The refund is issued via Stripe to the original payment method, no later than 14 days after we receive your request.

Express waiver: Twin+ is digital content delivered immediately. Before payment, you are asked to tick a box by which you (1) expressly request immediate access to the service before the end of the withdrawal period and (2) acknowledge waiving your right of withdrawal for the fully provided service. The order cannot be completed without ticking this box. If you withdraw while the service has only been partially provided, the refund may be reduced pro rata to the service provided.

5.2 iOS in-app purchase (Apple payment)

For purchases made in the iOS app, payment, withdrawal and refunds are handled exclusively by Apple, under the Apple Media Services Terms and Conditions. Any refund request must be addressed to Apple (reportaproblem.apple.com). ChronoTwin has no technical ability to issue refunds for these purchases.

6. Non-medical nature of the service

ChronoTwin is an informational wellness application. Scores, forecasts and tips are provided for informational purposes only and do not constitute medical advice, diagnosis or treatment. For any health question, consult a healthcare professional.

7. Encryption, secret phrase and backup

Your Twin is end-to-end encrypted with a key derived from your secret phrase, which we do not hold. As a result, ChronoTwin cannot read, restore or reset your data if you lose that phrase and no device remains unlocked: synced data and backup files then become permanently unreadable.

It is your responsibility to keep your secret phrase in a safe place and to regularly export the backup file offered in Settings. Any such data loss does not entitle you to a refund of the subscription, as access to the service remains available with a new secret phrase.

8. Consumer mediation

If a dispute is not resolved directly, you may refer the matter free of charge to the competent consumer mediator. Mediator contact details: [To be completed]. You may also use the European Online Dispute Resolution platform.

9. Governing law

These terms are governed by French law. Any dispute falls under the jurisdiction of the competent courts, subject to mandatory consumer protection rules.