Nook Privacy Policy
Last updated: 2026-07-09
Nook is an app for calming in-the-moment anxiety through short, body-felt actions (breathing, grounding, sound, slow mini-exercises). This page explains, in plain language, what data the app collects, what it does not, where the data lives, and what rights you have.
This is general information, not legal advice.
In short
- No account. Nook does not ask for your name, email, phone number, or any sign-up.
- Your journal never leaves your device. Anxiety entries, mood ratings, notes, triggers, favourite sounds, and mixes are stored only locally on your iPhone/iPad. We never see them and never send them anywhere.
- Pseudonymous usage analytics help us understand aggregate use. Nook uses a random app-install identifier and does not use it to identify you. Journal contents and free-text notes are not sent to analytics. You can turn analytics off in the Me tab (Я) → Analytics (Аналітика).
- Technical crash reports help us maintain the app's reliability. Journal contents and free-text notes are not sent to crash reporting.
- No tracking, no ads, no selling of data.
- Everything local can be wiped in one action: Me tab (Я) → Erase all data (Стерти всі дані).
Who is responsible for your data (the controller)
The owner of the Nook app is responsible for the processing described here. Contact: support.nook.app@gmail.com.
What Nook does NOT collect
- Account, name, email, phone number, password. There are none — no sign-in is required.
- The contents of your journal. They stay on your device and are not sent to analytics or crash reporting.
- Precise location, address, or GPS.
- Advertising or hardware identifiers (including IDFV — the vendor identifier is disabled on-device), IP address, carrier, or tracking city/region — all of these are disabled in analytics.
- Contacts, photos, microphone, or HealthKit health data — the app does not request them.
- No data for advertising or sale to third parties — there is none.
We do not track you across other apps or websites. In Apple's technical privacy manifest for Nook, tracking is disabled and there are no tracking domains.
What is stored only on your device
The following stays on your device and is never sent to us:
- Anxiety journal — entries (time, "before"/"after" ratings, triggers, a note, a link to an exercise or sound) and exercise sessions. Stored locally in the app's database (SwiftData). Files are protected by iOS encryption until the device is first unlocked.
- Settings — theme, vibration, background sound, breathing parameters, sound fades, and so on.
- Favourite sounds and sound mixes.
- Onboarding state and helper hints.
- A local subscription cache — only whether a subscription is active, the product identifier, and the expiration date; no payment details.
Nook has no backend and no cloud account. The app works offline.
Pseudonymous usage analytics (Amplitude)
To understand which features actually help, Nook may send pseudonymous usage analytics through the Amplitude service. Nook uses a random app-install identifier for aggregate usage analysis and does not use it to identify you. Journal contents and free-text notes do not enter analytics.
Analytics is on by default, but you can turn it off at any time in the Me tab (Я) → Analytics (Аналітика). If no analytics key is configured in a given build, analytics does not run at all (zero network requests).
Legal basis (for users in the EU/EEA): legitimate interest (improving the app), balanced by data minimisation and the ability to opt out. We grant you the full rights described below regardless of classification.
Crash and error reports (Sentry)
To maintain reliability, Nook may send technical crash and error reports through the Sentry service. Journal contents and free-text notes do not enter crash reporting.
If no key (DSN) is configured in a build, crash reports are not sent at all. Sending crash reports is a separate mechanism from analytics; the Analytics (Аналітика) toggle governs product analytics specifically.
Subscriptions and payment (Apple / StoreKit)
Nook Premium is an auto-renewable subscription through Apple's App Store.
- Payment is handled entirely by Apple through your Apple ID. We do not see or store card or payment details.
- The app receives from StoreKit only the fact of entitlement (an active subscription, the product identifier, the expiration date, and whether it will renew) and stores it locally to show status quickly. There is no account "with us" — the subscription is tied to your Apple ID.
- Apple's handling of data is governed by Apple's Privacy Policy.
Where data lives and for how long
- Local data (journal, settings, favourites, subscription cache) — on your device until you erase it or delete the app. Erase all data (Стерти всі дані) cannot be undone.
- Subscription data — in the App Store / Apple ID (managed by Apple).
Third parties (data processors)
Nook does not sell data. Technical data is processed only by these providers, acting as our processors:
| Provider | Purpose | Data |
|---|---|---|
| Amplitude | Pseudonymous usage analytics | Pseudonymous usage data; stored in the US |
| Sentry | Technical crash and error reports | Technical crash context |
| Apple (App Store / StoreKit) | Subscription and payment handling | Managed by Apple per Apple's Privacy Policy |
Your rights
- Turn off analytics at any time: Me tab (Я) → Analytics (Аналітика).
- Erase all local data: Me tab (Я) → Erase all data (Стерти всі дані) — removes the journal, settings, favourites, and mixes. An active subscription is kept. This cannot be undone.
- Remove everything completely — just delete the app; local data goes with it.
- There is no account to delete — we do not keep a profile about you.
For users in the EU/EEA (GDPR): you have the right to access, rectify, or erase your data, to restrict or object to processing, and to lodge a complaint with the data-protection supervisory authority in your country. Because the app does not store identifying data about you on our servers, the fastest way to exercise access and erasure is the in-app actions (Analytics (Аналітика), Erase all data (Стерти всі дані)). For any rights request, contact support.nook.app@gmail.com.
Children
Nook is not intended for children and does not knowingly collect data from children. If you believe a child has provided us with any data, contact us and we will help.
This is a wellness app, not a medical device
Nook helps you calm down in the moment, but it is not a medical app, a diagnostic tool, or a treatment, and it does not replace professional advice. If you feel unsafe or need help, contact a doctor or emergency services.
Changes to this policy
We may update this policy. The current version is always available in the app (Me tab (Я) → Privacy Policy (Політика приватності)) and at the link we provide on the App Store. The date at the top shows the last update.
Contact
Privacy questions: support.nook.app@gmail.com.
This is general information, not legal advice.