About the app
Analyse game
Improve your bridge game
Take pictures of all 4 hands. Enter the board details and you get the optimum play from a double dummy perspective (all hands open). You can also ask advice from our robot which will show both the bidding and the play.
Score tracker
Turn every rubber game into a duplicate
You take pictures of all hands and you select which benchmark to use, DDS or Robot. Then you enter your own score and the delta (IMP) is calculated. Keep track of all the boards you play.
BETA testers wanted!
Improve your bridge game
About Redoublet.com
Redoublet.com was founded by Quirinus (father) and Christiaan Tersteeg (son). Our ambition with Redoublet.com is to provide a unique app that allows people to analyse their physical bridge game and see what was the optimal play. Later we will also launch online play options.
If you have any feedback for us or would like to collaborate with us, don't hesitate to reach out.
Enjoy the app!
Christiaan and Quirinus
Get in Touch
We'd love to hear from you!
Contact:
christiaan.tersteeg@redoublet.com
quirinus.tersteeg@redoublet.com
Privacy Policy
Last updated: January 2026
1. Introduction
Redoublet.com ("we", "our", or "us") respects your privacy and is committed to protecting your personal data. This privacy policy explains how we collect, use, and protect your information when you use our website and mobile application for bridge game analysis.
2. Data Controller
The data controller responsible for your personal data is:
Redoublet.com
Operated by Quirinus and Christiaan Tersteeg
Boylestraat 9, 1098PC Amsterdam, the Netherlands
Contact:
christiaan.tersteeg@redoublet.com
quirinus.tersteeg@redoublet.com
3. Data We Collect
We collect and process the following categories of personal data:
Account & Profile Data:
- Email address
- Username / display name
- Firebase Authentication account and user ID
- Language preference
- Platform (iOS or Android)
App Usage Data:
- Game history and bidding sequences
- Game statistics and bridge hands played
- Group memberships
- Trainer and admin role assignments
- App usage patterns and preferences
Camera & Card Detection Data:
- Photos of bridge cards (sent to our server for detection, deleted after processing)
- Camera permission status
Technical Data:
- Device information (device type, operating system)
- Push notification tokens (via Expo)
- Crash reports and error diagnostics (via Sentry)
- IP address (collected implicitly via API calls)
Subscription & Purchase Data:
- Subscription status and purchase history (managed by RevenueCat)
- In-app purchase transaction data (processed by Apple App Store / Google Play Store)
4. Camera Usage and Photo Processing
Our app uses your device's camera to scan and detect bridge cards. Important information about this feature:
- Camera access is only requested when you choose to use the card scanning feature
- Photos are sent to our secure API for card detection and analysis
- Images are processed immediately and deleted from our servers after processing
- We do not store or retain photos after card detection is complete
- Card detection data is used solely to analyse your bridge game
- All data transmission is encrypted using industry-standard protocols (HTTPS/TLS)
- You can revoke camera permissions at any time through your device settings
5. Legal Basis for Processing
We process your personal data based on the following legal grounds:
- Contract performance: To provide our bridge analysis services to you (Article 6(1)(b) GDPR)
- Consent: For optional features such as push notifications and marketing communications (Article 6(1)(a) GDPR)
- Legitimate interests: To improve our services, ensure security, and analyse app usage (Article 6(1)(f) GDPR)
- Legal obligation: To comply with applicable laws and regulations (Article 6(1)(c) GDPR)
6. How We Use Your Data
We use your personal data to:
- Provide and maintain our bridge game analysis services
- Manage your account and authenticate your identity
- Process in-app purchases and manage subscriptions
- Send push notifications about app updates and game activity
- Analyse and improve our services and user experience
- Provide bridge game analysis via our automated robot system
- Monitor and fix technical issues through crash reporting
- Respond to your inquiries and provide support
- Comply with legal obligations
7. Data Sharing and Third-Party Services
We do not sell your personal data. We share data with the following third-party service providers who assist in operating our services:
- Firebase / Google Cloud — Authentication, database, cloud functions, and push notification infrastructure. Data shared: account data, user ID, app usage data. Privacy Policy
- Sentry — Error and crash reporting. Data shared: crash logs, device information, IP address. Privacy Policy
- RevenueCat — Subscription and purchase management. Data shared: user ID, purchase and subscription data. Privacy Policy
- Expo — Push notification delivery. Data shared: push notification tokens, device information. Privacy Policy
- Apple App Store / Google Play Store — App distribution and in-app purchase processing. Data shared: purchase transaction data. See Apple Privacy Policy and Google Privacy Policy
We may also share your data with legal authorities when required by law.
8. International Data Transfers
Some of our third-party service providers (including Firebase/Google Cloud, Sentry, RevenueCat, and Expo) are based in the United States. This means your personal data may be transferred to and processed in countries outside the European Economic Area (EEA). When such transfers occur, we ensure appropriate safeguards are in place, including Standard Contractual Clauses (SCCs) approved by the European Commission and/or reliance on adequacy decisions, to protect your data in accordance with GDPR requirements.
9. Data Retention
We retain your personal data for the following periods:
- Account data: Retained for as long as your account is active. Deleted upon account deletion request.
- Game history and statistics: Retained for as long as your account is active.
- Card detection photos: Deleted immediately after processing (not stored).
- Crash reports and diagnostics: Retained for up to 90 days.
- Subscription and purchase data: Retained as required by applicable tax and accounting laws (typically up to 7 years).
- Push notification tokens: Retained until you disable notifications or delete your account.
When data is no longer needed, it is securely deleted or anonymised.
10. Your Rights (GDPR)
Under the General Data Protection Regulation (GDPR), you have the following rights:
- Access: Request a copy of your personal data
- Rectification: Request correction of inaccurate data
- Erasure: Request deletion of your personal data
- Restriction: Request limited processing of your data
- Portability: Receive your data in a portable format
- Object: Object to certain types of processing
- Withdraw consent: Withdraw consent at any time where processing is based on consent
Account Deletion: You can delete your account directly from within the app via Settings > Delete Account. You may also request deletion through our account deletion page. When you delete your account, we permanently remove your profile data, game history, group memberships, and associated personal data. Certain data (such as purchase records) may be retained as required by law.
To exercise any of these rights, please contact us at christiaan.tersteeg@redoublet.com.
11. Automated Decision-Making
Our app uses an automated bridge analysis system ("Robot") that evaluates bidding and play decisions. This system provides analysis, scores, and recommendations based on bridge game theory. The robot's analysis may affect competition rankings and game scores within the app. This automated processing is performed to deliver the core functionality of our service. You are always free to disregard the robot's analysis, and no decisions with legal or similarly significant effects are made solely through automated means.
12. Data Security
We implement appropriate technical and organisational measures to protect your personal data, including encryption of data in transit (HTTPS/TLS), secure cloud infrastructure (Firebase/Google Cloud), access controls, and regular security reviews. However, no internet transmission is completely secure, and we cannot guarantee absolute security.
13. Cookies
Our website uses essential cookies to ensure proper functionality. We also use analytics cookies to understand how visitors interact with our website. You can control cookie preferences through your browser settings.
14. Children's Privacy
Our services are not directed to children under 16. We do not knowingly collect personal data from children under 16. If you believe we have collected data from a child under 16, please contact us immediately.
15. Changes to This Policy
We may update this privacy policy from time to time. We will notify you of any significant changes by posting the new policy on this page, updating the "Last updated" date, and where appropriate, notifying you via email or in-app notification.
16. Complaints
If you have concerns about how we handle your personal data, you have the right to lodge a complaint with the Dutch Data Protection Authority (Autoriteit Persoonsgegevens, www.autoriteitpersoonsgegevens.nl) or your local supervisory authority.
Contact Us
If you have any questions about this privacy policy or our data practices, please contact us:
Email:
christiaan.tersteeg@redoublet.com
quirinus.tersteeg@redoublet.com
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 the JACK 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.
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), JACK API (AI 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 support@redoublet.com.
Frequently Asked Questions
It plays 5 card major according to the standard of the Dutch Bridge Association (NBB) - club player. See card below.
Yes, the app is free. We will - at some point - convert to a freemium model (app development and hosting isn't free :))
You can request account deletion through our account deletion page.
It is likely in your SPAM box. If that's not the case, contact us directly.
Use the report bug button on the top left of your app screen. For other feedback: please contact us directly.