Feather Privacy Policy

Last updated: 2026-11-01

This policy explains what information the Feather app uses, who receives it and what you control. It covers the Android version of Feather.

Who we are

Feather is provided by GaiaHex Ltd ("we", "us"), the controller of the personal information described here.

Contact: [email protected] or our privacy request page.

In short

Feather has no accounts. Your diary stays on your phone; we have no server that stores it.
Usage statistics, crash reports and advertising measurement are off until you turn them on, and you can turn them off at any time.

What stays on your phone

Feather saves what you enter and create: your smoking history and costs, quit dates, cravings and slips, triggers, moods, notes, places, replacement products, answers about your smoking and health, optional profile details (such as name, birthday, gender or pregnancy), and your goals, reasons, plans, progress, game scores, reminders and settings.

This can include health information. It is kept in the app's storage on your phone. Feather does not send your entries, notes, photos or saved locations to us or to the services below. Feather adds no encryption of its own; Android's app storage protection and your screen lock protect this data.

Photos: choosing a photo uses Android's photo picker, so Feather gets only the photo you pick; taking one asks for camera access. Feather saves its own copy, and the original in your gallery stays as it is.
Location: if you allow location access, Feather records your location once when you log a craving, while you use the app (automatically, once allowed). There is no background tracking. You can also pick a place on a map without allowing location access.
Audio: Feather does not record audio.
Reminders are scheduled on your phone, not by a server of ours. Notifications can show your progress on the lock screen.
Backups: if Android backup is on, your Feather data and photos can be included in your device backup and restored to a new phone.

What leaves your phone, and why

Data sent to the services below uses encrypted (HTTPS) connections. Every service you connect to sees your IP address.

Needed for the app to work

Google Play handles purchases and payments. We never see your card details.
Superwall shows subscription offers and checks whether you have paid access. It receives an anonymous Superwall ID, device and app details, an approximate location based on your IP address, and your purchase and subscription status.
Google Maps draws the map when you open the places map or pick a place. Google receives the map area you view, your IP address and device information, whether or not you allow location access or statistics.

Only if you allow it

You can change these choices at any time in Menu → Privacy Protection.

Analytics turns on:

PostHog (usage statistics, stored in the EU): which screens you open and for how long, onboarding steps, that you logged a craving or used SOS (not what you entered), games, articles and Journey steps you open, and offers, trials and purchases (product, plan, price and currency). Each event carries a random ID created on your phone, a session ID, a time, the app version and the operating system. PostHog is set not to store IP addresses.
Sentry (crash reports, stored in the EU): the type of error, where in the code it happened and the app version; for some crashes, device and Android version details. Reports do not include a user ID, and for errors in the app's own code we remove the error message.
Superwall also records its own usage events about offers and app sessions.

Advertising attribution works only while analytics is also on. It turns on:

Meta (Facebook) advertising measurement: that the app was installed and opened, that you finished onboarding, and that you started a trial or bought a subscription (with price and currency). Meta's software also collects your device's advertising ID, other device identifiers, which Meta ad (if any) led to your install, technical details and IP address. Meta uses this to measure our ads and may also use it for its own purposes, so this is sharing for advertising.
Campaign codes: Feather asks Google Play which ad campaign led to your install and sends PostHog only the campaign codes and click and install times, not your advertising ID.

These events never include your diary, but they can show that you use a quit-smoking app.

Turning a choice off stops new data for it. Turning analytics off also deletes Feather's random analytics ID and campaign codes from your phone, stops crash reports and stops Meta measurement, including its use of your advertising ID. Turning analytics on again creates a new ID. Data already sent is not deleted.

Email: contact buttons open a draft in your email app; nothing is sent until you send it. The draft includes the app version and a random install number to help us, which you can remove. Your email provider and ours receive what you send.
Sharing: sharing an achievement or certificate creates an image that your phone's share menu sends to the app you choose. Check it first: it can show your name or progress.

Legal bases (EU and UK)

Providing the features you use, maps and subscriptions is necessary for the service you asked for. Analytics, crash reports and advertising measurement rely on your consent, which you can withdraw at any time. We keep purchase and legal records to meet legal obligations.

Where data is processed

PostHog and Sentry store our data in the EU. Superwall, Meta and Google may process data in the United States and other countries. You can ask us which safeguards apply to these transfers.

How long data is kept

On your phone: until you delete it in the app or uninstall Feather. Backups follow your backup settings.
PostHog usage events: up to 1 year.
Sentry crash reports: up to 90 days.
Meta advertising events: Meta's business terms allow up to 2 years.
Purchase records: kept by Google Play and Superwall as long as your subscription and legal or tax duties require.
Emails to us: as long as needed to handle your request.

Deleting your data

In the app: Menu → Privacy Protection → Delete my data deletes your entries, the photos Feather saved, your settings and your privacy choices from your phone. If something cannot be deleted, the app shows an error so you can try again. Uninstalling Feather also removes its data from your phone.
Not deleted: device backups, photos in your gallery, images you shared, and data already sent to the services above.
Data held by services: use our privacy request page. Because Feather has no accounts and uses random IDs, we may not be able to find records about you; we will tell you what we found and did.
Deleting data does not cancel a subscription. Cancel it in Google Play.

Your rights

Depending on where you live (for example, under the GDPR), you can ask to access, correct or delete your data, receive a copy, restrict or object to its use, and withdraw consent; withdrawal does not affect earlier use. We reply within one month. If the law allows more time for a complex request, we tell you within that month. You can also complain to a data protection authority.

Children

Feather is intended for adults aged 18 and over and is not directed at children. If you believe a child has sent us personal information, contact us and we will delete it.

Changes

We post updates here with a new date and give any notice the law requires.

Contact

[email protected] or our privacy request page. See also our Terms of Use.