Terms of Service

Last updated: January 31, 2026

1. Introduction & Acceptance

Welcome to Redoublet ("we", "us", "our"). By accessing or using the Redoublet application (available on iOS, Android, and the Web) or any related services, you agree to be bound by these Terms of Service. If you do not agree with any part of these terms, you must not use our service.

You must be at least 16 years of age to use Redoublet, in accordance with the Dutch implementation of the General Data Protection Regulation (GDPR). Redoublet is operated from the Netherlands.

2. Description of Service

Redoublet is a bridge card game application available on iOS, Android, and the Web. The service offers:

  • Free features: Analyse Game — scan bridge hands using your device camera and receive robot-powered analysis of the play.
  • Pro features (subscription required): Score Tracker with unlimited scoring sessions, and Play Online with daily and weekly competitions.

3. Account Registration

To use Redoublet, you must create an account. You may register using:

  • Email and password
  • Google Sign-In
  • Facebook Login

Email verification is required to activate your account. You must choose a username between 3 and 20 characters. Each person may maintain only one account. You are responsible for maintaining the security of your account credentials and for all activity that occurs under your account.

4. Subscription & Payment

Redoublet offers a monthly Pro subscription. The subscription price is displayed in your App Store or Play Store and may vary by country and currency.

  • New users receive a 30-day free trial upon account creation.
  • Subscriptions auto-renew at the end of each billing period unless cancelled at least 24 hours before the end of the current period.
  • Payment is processed through the Apple App Store or Google Play Store.

For Apple App Store users: Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless it is cancelled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.

We may change subscription prices from time to time. Price changes will be communicated in advance, and any change will take effect at the start of the next billing period following the notice.

5. Free Trial

All new users receive a 30-day free trial starting from the date of account creation. During the trial period you have full access to all Pro features. The free trial is available once per user. No payment information is required during the trial period.

6. User Conduct & Fair Play

When using Redoublet, you agree not to:

  • Cheat or use unfair advantages in competitions
  • Manipulate scores or game results
  • Use bots, automated tools, or scripts to interact with the service
  • Engage in abusive, harassing, or offensive behavior toward other users
  • Reverse-engineer, decompile, or disassemble any part of the application

Violations of these rules may result in immediate suspension or permanent termination of your account.

7. Camera & Image Processing

Redoublet uses your device camera to scan bridge playing cards. Images captured are processed via the Carddetection API for card recognition purposes. These images are not permanently stored on our servers. Explicit permission is required before the camera can be accessed.

8. AI & Robot Features

Redoublet includes an AI robot for game analysis and online play. The AI features are provided "as-is" and are not guaranteed to produce optimal play in all situations. Double Dummy Solver (DDS) results represent theoretical outcomes based on perfect information (all four hands visible) and may differ from practical over-the-table results.

The Double Dummy Solver used in Redoublet is based on the work of Bo Haglund, Soren Hein, et al.

9. Intellectual Property

The Redoublet service, including its design, code, graphics, and content, is owned by Redoublet and protected by intellectual property laws. You are granted a limited, non-exclusive, non-transferable license to use the application for personal, non-commercial purposes. You may not copy, modify, distribute, sell, or lease any part of the service. The rules of the game of bridge themselves are not claimed as proprietary.

10. User-Generated Content

You retain ownership of your game data. By using the service, you grant Redoublet a license to use your data in anonymized form for statistics and leaderboards. Group names, usernames, and game results may be visible to other users within the context of the service (e.g., competition leaderboards, group score tracking).

11. Privacy

Your privacy is important to us. Please review our Privacy Policy for details on how we collect, use, and protect your information.

Redoublet uses the following third-party services: Firebase (authentication and database), RevenueCat (subscription management), Sentry (error tracking), AI API (game analysis), DDS API (double dummy analysis), and Carddetection API (card scanning). Push notifications can be managed through your device settings.

12. Account Termination & Deletion

You may delete your account at any time using the in-app account deletion feature. Account deletion is also available via our web form. Upon deletion, all your data is permanently removed.

If you have an active subscription, please cancel it through the App Store or Play Store before deleting your account to avoid further charges.

Redoublet reserves the right to suspend or terminate accounts that violate these Terms of Service.

13. Disclaimers & Limitation of Liability

The service is provided "AS IS" and "AS AVAILABLE" without warranties of any kind, either express or implied. Redoublet does not warrant that the service will be uninterrupted, error-free, or free of harmful components.

  • We are not liable for the accuracy of robot or AI analysis.
  • We are not liable for outages or issues caused by third-party services.
  • Our total liability to you is limited to the amount you have paid to us in the 12 months preceding the event giving rise to liability.

These limitations are subject to mandatory provisions of Dutch and European Union law. Nothing in these terms limits liability for gross negligence or willful misconduct.

14. Governing Law

These Terms of Service are governed by the laws of the Netherlands. Any disputes arising from these terms shall be submitted to the competent court in the Netherlands.

If you are a consumer in the European Union, you may also use the European Commission's Online Dispute Resolution platform at https://ec.europa.eu/consumers/odr.

Your mandatory consumer rights under EU law are not affected by these terms.

15. Changes to Terms

We may update these Terms of Service from time to time. Changes will be communicated through the app or via email. Your continued use of the service after changes take effect constitutes your acceptance of the revised terms. The "Last updated" date at the top of this page reflects the most recent changes.

16. Contact

If you have any questions about these Terms of Service, please contact us at [email protected].