Privacy Policy

We respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, use, and share your personal data when you use our products.

Data Controller: Andrew Shephard, Zahradníčkova 1220/20a, Prague, Czech Republic 150 00. Contact: hello@chunks.app.

Information We Collect

We may collect the following types of personal data from you:

• Contact information, such as your name and email address, if you create an account or sign in
• Usage information, such as your IP address, browser type, and operating system
• Device and app information, such as device model, operating system version, app version, language, and an app install identifier
• Activity in the app, such as which stories you open, play, finish, favourite, or search for
• Session recordings of your use of the app — see Session Recordings below
• Content you create, such as the title and description you enter when generating a personalised story
• Transaction information, such as your purchase history and subscription status. We never receive your card details
• Notes the Chunks team writes about your account when helping you with a support request — see Support Access below
• A push notification token, if you enable notifications
• Crash and performance diagnostics when something goes wrong
• An advertising identifier, only on iOS and only if you allow tracking when asked — see Advertising and Attribution below

You can use most of the app without creating an account. We may collect this information directly from you, from your device, or from third-party sources such as the app stores and attribution providers.

How We Use Your Information

We may use your personal data for the following purposes:

• To provide you with access our products and services
• To communicate with you about your account or our products and services
• To improve our products and personalize your user experience
• To comply with our legal obligations or enforce our terms of use

We may also use your personal data for other purposes with your consent.

Information Sharing

We may share your personal data with third-party service providers who assist us with our business operations, such as payment processors or marketing agencies. We may also share your personal data if required by law or to protect our legal rights or the safety of our users.

Services We Use

We use the following providers to run Chunks. Each processes personal data on our instructions, for the purpose listed:

• Google Firebase — sign-in, storing your library and progress, push notifications, crash reporting, performance monitoring, and app analytics (Google Analytics for Firebase).
• Google BigQuery (Google Cloud, EU) — our data warehouse. We combine app analytics, subscription records and advertising attribution there, linked by your random account ID, to understand retention and revenue and to help with support requests.
• PostHog — product analytics and session recordings, so we can see how the app is used and where it goes wrong. Hosted in the EU.
• RevenueCat — recording what you have purchased and whether your access is active. We also import RevenueCat's transaction records into our data warehouse.
• AppsFlyer — linking app installs to your account ID so we can measure which advertising campaigns bring people who go on to subscribe. We also receive aggregate install and advertising-cost reports from AppsFlyer.
• Apple Search Ads — telling us which Apple Search Ads campaign, if any, led to your install.
• Algolia — powering search, including what you type into the search bar.
• Anthropic and ElevenLabs — writing and narrating personalised stories from the prompts you enter.
• Resend — delivering our emails: the newsletter, welcome emails and account-related emails.
• Microsoft Clarity — session analytics on the chunks.app website (not the app).
• Cloudflare — serving content and protecting the service from abuse.
• Apple and Google — processing payments and handling refund requests.

We do not sell your personal data, and we do not share it with advertisers for their own purposes.

Session Recordings

We record app sessions through PostHog. A recording is a reconstruction of what appeared on screen and where you tapped, which we use to find bugs and to understand where people get stuck. Recordings capture the text and images displayed in the app, because the app mostly shows published educational content rather than anything you have written.

Screens showing your account email or user ID are masked, so those values do not appear in a recording. We never record anything outside the Chunks app, and we do not capture your keyboard input from other apps.

If you would rather not be recorded, email hello@chunks.app and we will exclude your account and delete any recordings we still hold.

Advertising and Attribution

We advertise Chunks, and we want to know which adverts actually work so we are not paying for ones that do not. On iOS, we ask permission before using your device's advertising identifier for that purpose. If you decline, we don't access the advertising identifier, and the rest of the app is unaffected. You can change your answer at any time in iOS Settings under Privacy & Security, Tracking. Separately from the advertising identifier, AppsFlyer links your install to your random Chunks account ID so we can see which campaigns bring people who subscribe; see Services We Use.

We use this data to measure our own advertising. We do not build advertising profiles about you, and we do not pass your data to advertising networks for them to target you elsewhere.

Personalised Stories

When you generate a personalised story, the title and description you enter are sent to our AI providers (Anthropic for the text, ElevenLabs for the narration) to produce it, along with the resulting story. Please do not enter personal or sensitive details about yourself or anyone else in those fields — they are not needed to write a good story, and they are best left out of any system that does not need them. We keep a record of your generated stories so they stay in your library, and you can delete them from the app at any time.

International Transfers

We are based in the Czech Republic, and some of the providers listed above process data in the United States or other countries outside the European Economic Area. Where that happens, the transfer is covered by the European Commission's Standard Contractual Clauses or another approved safeguard, as set out in our agreements with each provider. You can ask us for details of the safeguards that apply by emailing hello@chunks.app.

Purchases and Refund Requests

Purchases are made through the Apple App Store or Google Play, and we never see your card details. We use RevenueCat as a processor to record what you have bought and whether your access is currently active, so the app can unlock the right content on any device you sign in on.

When you ask Apple or Google for a refund, the store may ask us for information about how the purchase was used before it decides. Where it does, we may share:

• how much of the content the account had accessed, and how long it had been active;
• whether the purchase was delivered successfully;
• whether the account has requested refunds previously.

We share this so the store can reach a fair decision, and to prevent misuse of purchases and refunds. Our legal basis is legitimate interests. The store, not Chunks, makes the final decision on every refund. You can object to this sharing at any time by emailing hello@chunks.app, and we will stop sharing it for your account.

We also keep a record of refunds associated with an account, which we use to apply the limits described in our Terms of Use. Those limits are applied by staff review and simple counting rules, not by automated decision-making that produces legal effects.

Support Access

When you contact us, or when we need to look into a billing question, a bug, or a data request, the Chunks team (currently the founder) can look up your account in our internal support tool. Each lookup must give one of a fixed list of reasons: a support email, a refund or billing question, a data access or deletion request, or a bug investigation.

A lookup can show: your account ID and username; your email address, which is hidden by default and shown in full only when deliberately revealed; when your account was created and last active; your platform, app version and approximate country; how you found the app (for example, which Apple Search Ads campaign); your subscription status, plan and renewal dates; the total you have paid, any refunds, and a payment history; and your activity, such as stories started and completed, listening time, streaks, quiz results, your favourite category, and whether you prefer reading or listening.

Every lookup is recorded in an access log with who looked, the reason, and when. Revealing your email address, adding a note and exporting your data are each logged as well. Access logs are kept for 400 days and then deleted automatically. We can add a support note to your account to keep track of a conversation with you, and we can export a copy of your data when you ask for it. If someone's access to the tool is removed, it ends immediately.

Cookies and Similar Technologies

We may use cookies and similar technologies to collect usage information and improve your user experience. You can control the use of cookies through your browser settings.

Data Retention

We keep personal data only for as long as we need it for the purposes in this policy, or longer where the law requires it:

• Your account, library and progress: until you delete your account.
• Product analytics events (PostHog, Google Analytics for Firebase, our data warehouse): for as long as we need them to understand how the app is used. We will publish a fixed period here once one is in place.
• Support notes about your account: until you delete your account.
• Support access logs: 400 days, then deleted automatically.
• Payment and refund records: 6 years, for tax and accounting.
• Server logs: 30 days.
• Newsletter subscription: until you unsubscribe.
• Records that an account was deleted: kept permanently. They contain no personal data: no account ID, email or name.
• Records of changes to who can use our support tool: kept permanently. They contain team account IDs only, not information about you.

Your Rights

You have the right to access, correct, or delete your personal data that we have collected. You also have the right to object to the processing of your personal data or to request that we restrict the processing of your personal data. To exercise these rights, please contact us at hello@chunks.app.

Deleting Your Account

If you're signed in, you can delete your account from your profile in the app. From app version 2026.10.21 this is available to everyone, including people who use Chunks without signing in. Your account is deleted straight away, and the copies in our analytics tools and data warehouse are removed shortly afterwards.

You can also ask using the form at chunks.app/delete-account. With the deletion code shown in your profile (app version 2026.10.21 or later), the request is completed automatically. Otherwise, give your user ID (shown in your profile); we check those requests by hand and complete them within 30 days. You can also email hello@chunks.app.

What we delete: your account, library and progress; your username and referral code; story requests and feedback; any support notes about you; your Apple Search Ads attribution record; your rows in our data warehouse; and your PostHog analytics profile and events. Personalised stories that were never published are archived and unlinked from you. A personalised story we had already published in the Chunks catalogue stays available, but no longer linked to you.

What we anonymise: records of notifications we sent you and which ones you opened. Your account ID is removed from them, and only the counts remain.

What we keep:

• payment and refund records, for 6 years, for tax and accounting, and so we can apply the refund limits in our Terms of Use;
• a record of how many personalised stories the account requested, so that deleting and recreating an account cannot reset the generation limit;
• a record that a deletion happened, containing no personal data;
• our support access logs, until they expire after 400 days;
• Google's raw Google Analytics export, which Google does not let us edit for individual users. We exclude deleted accounts from everything we build from it.

Deleting your account does not cancel a subscription, because subscriptions are managed by Apple or Google. Cancel it in your App Store or Google Play settings. The app reminds you of this before you delete.

For European Users (GDPR)

If you are located in the European Economic Area (EEA), the United Kingdom, or Switzerland, you have additional rights under the General Data Protection Regulation (GDPR).

Legal Basis for Processing

We process your personal data on the following legal bases:

• Contract performance: Providing the app, your library and progress, purchases, and account emails.
• Legitimate interests: Product analytics, session recordings, advertising attribution (including AppsFlyer and Apple Search Ads), website analytics, fraud and refund-abuse prevention, security, and support access.
• Consent: Use of your device's advertising identifier on iOS, which we ask for through Apple's tracking prompt, and the newsletter, which you choose to sign up to. You may withdraw consent at any time.
• Legal obligation: Keeping payment and refund records for tax and accounting.

Your GDPR Rights

In addition to the rights listed above, you have the right to:

• Right to erasure: Request deletion of your personal data. You can delete your account in the app, use the form at chunks.app/delete-account, or email hello@chunks.app. We delete your data except where we must keep part of it by law or for the specific reasons set out under Deleting Your Account.
• Right to data portability: Receive your personal data in a structured, commonly used, machine-readable format.
• Right to restrict processing: Request that we limit how we use your data while a complaint is being resolved.
• Right to object: Object to processing based on legitimate interests, including profiling.
• Right to lodge a complaint: File a complaint with your local data protection authority if you believe your rights have been violated.

Data Protection Contact

For any GDPR-related enquiries or to exercise your rights, contact us at hello@chunks.app. Data controller: Andrew Shephard, Zahradníčkova 1220/20a, Prague, Czech Republic 150 00.

For California Users (CCPA/CPRA)

If you are a California resident, the California Consumer Privacy Act (CCPA) and the California Privacy Rights Act (CPRA) provide you with additional rights regarding your personal information.

Categories of Personal Information We Collect

• Identifiers: Name, email address, IP address, device identifiers.
• Internet or electronic network activity: Browsing history within the app, interactions with content, search queries.
• Commercial information: Purchase history, subscription status.
• Inferences: Content preferences and interests based on your usage patterns.

Your CCPA/CPRA Rights

• Right to know: Request details about the categories and specific pieces of personal information we have collected about you.
• Right to delete: Request deletion of your personal information, subject to certain exceptions.
• Right to correct: Request correction of inaccurate personal information.
• Right to opt out of sale or sharing: You have the right to opt out of the sale or sharing of your personal information.
• Right to non-discrimination: We will not discriminate against you for exercising any of your CCPA/CPRA rights.

Do Not Sell or Share My Personal Information

We do not sell your personal information. We do not share your personal information for cross-context behavioural advertising. We may share certain data with analytics and advertising partners (such as PostHog, Google Analytics, and Meta) to help us understand how our app is used and to reach potential users. You may opt out of this sharing by contacting us at hello@chunks.app.

To exercise any of your CCPA/CPRA rights, contact us at hello@chunks.app. We will verify your identity before processing your request and respond within 45 days.

Cookies and Consent

Our website and app use the following categories of cookies and tracking technologies:

• Essential cookies: Required for the website to function. These cannot be disabled.
• Analytics cookies: Help us understand how visitors interact with our website and app (e.g., PostHog, Google Analytics). These collect anonymised usage data.
• Marketing cookies: Used to deliver relevant advertisements and measure campaign effectiveness (e.g., Meta Pixel, TikTok Pixel).

You can manage your cookie preferences through your browser settings. Most browsers allow you to block or delete cookies. Note that disabling certain cookies may affect the functionality of our website.

Changes to Our Privacy Policy

We reserve the right to modify this privacy policy at any time. If we make material changes to this privacy policy, we will notify you by email or by posting a notice on our website and app.