Privacy Policy

This Privacy Policy explains how Tandem (“Tandem,” “we,” “us”) handles information in connection with the Tandem iOS app and the website at heytandem.cc. Tandem is operated by Hey Tandem, the data controller, based in Paris, France

The short version

Tandem is local-first. The things you tell the app stay on your device. We do not run accounts, and we do not collect your pregnancy details on our servers. The only information that leaves your phone is a question you choose to send to Nolan, and the limited data needed to process a subscription.

Information stored on your device

The app stores the following locally, on your phone, in its own database. It is not transmitted to us:

• Your profile: due date, the names you enter, and delivery preferences.
• Your briefs: the weekly content you read in the app.
• Your conversations with Nolan and any reminders you ask him to create.

If you delete the app, or use “Redo onboarding” to reset your profile, this information is removed from the device.

Information sent when you use Nolan

Nolan is the assistant inside Tandem. When you send Nolan a message, that message and the context needed to answer it are sent to our AI model provider, OpenAI, which generates the response. This processing is subject to the provider’s terms and privacy practices. We do not use your conversations to build a profile of you, and we do not sell them. and does not retain it, nor use it to train its models.

Subscriptions and payments

Nolan is offered as a subscription. Purchases are processed by Apple through the App Store, and subscription status is managed using RevenueCat. We receive limited, non-payment information such as an anonymous app user identifier, your entitlement status, and transaction metadata. We never receive your card number or full payment details. See Apple’s privacy policy and RevenueCat’s privacy policy.

Calendar and reminders

With your permission, Tandem can read from and write to your device calendar and reminders, so Nolan can track appointments and nudges you ask for. This access stays on your device and your associated Apple account. We do not receive a copy of your calendar.

The website

The website at heytandem.cc is a marketing page. It is hosted on Cloudflare, which processes standard server logs (such as IP address and request data) to deliver and secure the site. If you join a waitlist or contact us by email, we use the email address you provide to reply or to notify you about availability. contact@heytandem.cc

What we do not do

• We do not sell your personal information.
• We do not include advertising SDKs or ad trackers.
• We do not run third-party behavioral analytics on your in-app data.

Data retention

On-device data lives only as long as the app is installed and your profile exists. Information that passes through third parties (Apple, RevenueCat, the AI provider, Cloudflare) is retained according to their own policies.

Children

Tandem is intended for adults who are expecting a child. It is not directed to children, and we do not knowingly collect information from children.

Your rights

Tandem is operated from France, so the EU General Data Protection Regulation (GDPR) applies. You have the right to access, rectify, erase, restrict, or object to the processing of your personal data, and the right to data portability. Because most of your data never leaves your device, you can exercise the core of these rights yourself by editing or deleting your data in the app. For anything else, contact us at contact@heytandem.cc.

If you believe we have not handled your data properly, you have the right to lodge a complaint with the French data protection authority, the CNIL.

Changes to this policy

We may update this policy from time to time. When we do, we will revise the “last updated” date above.

Contact

Questions about privacy? Email contact@heytandem.cc.