The shortest privacy policy you’ll read this year.

Effective November 5, 2026

What Hazelnut collects

Nothing. There are no accounts, no analytics, no crash reporting, no advertising identifiers, and no third-party SDKs. Hazelnut never sends your data over the internet — the only networking it does with your data is short-range radio to a phone you have paired yourself.

Where your data lives

Everything you log — feedings, sleep, diapers, photos, your child’s profile — is stored in a database on your device. Hazelnut never transmits it to the developer or to any server. The only other places Hazelnut sends it are phones you have paired and wherever you choose to send a backup. Deleting the app deletes the data on that phone, along with its automatic backups; paired phones, backups you have copied elsewhere, and existing iCloud or computer backups of the phone keep their own copies.

Backups and exports

Backups are part of Hazelnut Full. Export Backup creates a compressed snapshot on your device that you control completely — where you save or send it is up to you (Files, iCloud Drive, AirDrop). Automatic backups, if you turn them on, are written to a folder on the same device. Hazelnut never uploads a backup anywhere itself. Like other app data on an iPhone, Hazelnut’s data and backups are included in any iCloud or computer backup of the phone that you have turned on; those belong to your Apple Account or your computer, and we have no access to them.

Device-to-device sync

Hazelnut can optionally sync between paired phones directly, peer-to-peer, using Bluetooth Low Energy and Wi-Fi Aware — short-range radio between devices that are near each other. Data travels only between phones you have paired — your own, a partner’s, or a caregiver’s: no server, no account, and nothing passes through the internet. Sync is off unless you turn it on, it only reaches phones you have explicitly paired, and you decide per phone which categories and how much history that phone receives.

Purchases

Hazelnut Full is bought through Apple’s App Store. Showing the price, buying, and restoring a purchase are the only times the app goes online, and those requests go to Apple, not to us. Apple handles the payment; we never receive your name, email, or payment details, and nothing you have logged is sent with the request. Once unlocked, Hazelnut works fully offline.

This website

Sets no cookies, runs no analytics, and loads nothing from third parties. Our hosting provider (Vercel) may keep standard server access logs to operate the service; we don’t add anything on top.

Contact

Questions about this policy? Reach out at support@hazelnutapp.com. If you email us, we receive your email address and whatever you include — such as the error code, app version, and iPhone model that Email Support fills in for you to review — and we use it to help you.

Changes

If the policy ever changes, this page and the effective date above will be updated.