Privacy Policy
TandemBaby is built by parents, for parents. Your family's privacy isn't a feature — it's a foundation. Here's exactly how your data is handled.
Your baby's data stays on your device
All baby tracking data — feeds, sleep sessions, diaper changes, medicines, milestones, growth measurements, and notes — is stored locally on your iPhone using Apple's SwiftData framework. We do not have access to this data. It never leaves your device. There is no cloud sync (yet).
Analytics
We use TelemetryDeck, a privacy-first European analytics provider, to understand how the app is used. TelemetryDeck collects:
- Anonymous, SHA-256 hashed device identifiers (we cannot identify you)
- Basic usage events (e.g., "app launched", "feed logged", "paywall shown")
- Device type and iOS version
TelemetryDeck does not collect your name, email, IP address, or any baby data. Their privacy policy is available at telemetrydeck.com.
Subscriptions
If you subscribe to TandemBaby Pro, payment is handled entirely by Apple through the App Store. We never see your credit card number, billing address, or Apple ID. Apple provides us with an anonymous transaction receipt to verify your subscription status.
Sign in with Apple
If you use Sign in with Apple, we receive only a unique anonymous identifier and, optionally, a relay email address managed by Apple. We do not receive your real email address unless you choose to share it.
Children's privacy
TandemBaby is designed for parents and caregivers, not for use by children. We do not knowingly collect personal information from children. The baby data you enter is stored only on your device.
Data storage & deletion
Since all data is stored on-device, deleting the TandemBaby app permanently removes all your data. There are no backups on our servers because we don't have your data. If you use iCloud backup, your app data may be included in your device backup — this is managed by Apple, not by us.
Third-party services
TandemBaby uses zero third-party SDKs. Our analytics are sent via a simple HTTPS request to TelemetryDeck's API. There are no advertising SDKs, no Facebook SDK, no Google Analytics, no Firebase. Nothing.
No ads
TandemBaby does not show advertisements and never will. We make money through subscriptions, not your data.
GDPR compliance
For users in the European Economic Area:
- Right to access: Your data is on your device — you already have full access.
- Right to deletion: Delete the app and all data is gone. We have nothing to delete on our end.
- Right to portability: Pro subscribers can export all data as CSV.
- Data processing basis: Analytics are processed under legitimate interest (improving the app). No consent is needed because no personal data is collected.
Changes to this policy
If we make changes to this privacy policy, we'll update the "Last updated" date above. For significant changes, we'll notify you through the app.
Contact
Questions about privacy? Email us at support@tandembaby.com.