Privacy Policy

Last Updated: November 10, 2026

PosterWords does not require an account and never asks for your name, email address or phone number. Here is how your data is handled:

Data We Process

AI Scenario Generation: Your scenario text (typed or chosen from a recommended topic) and any character you ask us to break down are sent through our Cloudflare Worker proxy to an AI model provider (DeepSeek) to generate lessons in real time. Requests include an anonymous device ID; the first 300 characters of each scenario are retained for up to 90 days. We do not store the generated lesson content on our servers.

Bookmarks & Learning Data: Stored locally on your device. We cannot access them.

iCloud Sync (optional): Your learning data (bookmarks, review progress, and study streaks) is stored in your personal iCloud account via Apple CloudKit. We cannot access it.

Subscription Management: Purchases are processed by Apple. We use RevenueCat to manage subscription status with an anonymous app user ID, and your Apple-signed subscription receipt is sent to our Worker to verify whether you are a Pro subscriber (our Worker also receives Apple’s App Store Server Notifications about subscription events). We never receive your payment details or Apple ID.

Usage & Diagnostics Analytics: To understand how features are used and to improve the app, we use Google Firebase Analytics and Firebase Crashlytics. Firebase Analytics collects anonymous product-interaction events (for example: which onboarding step was reached, that a lesson was generated, that a review session completed, or that a paywall was shown), screen views, and non-identifying properties such as app version, selected native language, HSK level band, learning motivation, and whether you have a Pro subscription. Firebase Crashlytics collects crash reports and diagnostic information such as device model, operating system version, and app state at the time of a crash. This data is associated with an app-instance identifier generated by Firebase, not with your name or any account. We do not send the text of your prompts or any content that identifies you. The data is processed by Google LLC and is used only to understand and improve the app. See Firebase privacy information.

Advertising (Free Users Only)

Who sees ads: Non-Pro users may optionally watch a rewarded video ad to unlock one additional AI scene generation when the free quota is exhausted. Pro subscribers do not see ads. Ads never appear during card study, onboarding, or checkout.

Ad provider: Google AdMob (Google LLC). Ads are shown only when you tap “Watch ad for +1 scene” — they are never forced during learning.

Consent & tracking (iOS):

We use Google’s User Messaging Platform (UMP) to collect consent where required (e.g. EEA/UK).
On iOS, we may request Apple’s App Tracking Transparency (ATT) permission before personalized ads. You can decline; non-personalized ads may still be shown if you choose to watch an ad.
You can change ad privacy choices anytime in Profile → Ad privacy choices (when available for your region).

Data used for ads: AdMob may process device identifiers, coarse location (derived from IP), ad interaction data, and diagnostic data to deliver and measure ads. See Google’s Privacy Policy and Google Advertising Policies.

Children: The app is not directed at children under 13. We do not knowingly serve personalized ads to child-directed audiences.

Data We Do NOT Collect Directly

We do not collect your name, email address, precise location, contacts, photos, or audio recordings. Our servers see only your approximate country (derived from your IP address by Cloudflare) and your device language. We do not sell your personal information. We do not directly collect advertising identifiers; if you choose to watch a rewarded ad, Google AdMob may process device identifiers (including IDFA only if you allow App Tracking Transparency) as described in the Advertising section above. Our own usage analytics are not linked to your identity and are not used to track you across apps or websites.

Third Parties

Cloudflare Worker (request relay, quota and operational records), Google Firebase Analytics and Crashlytics (usage analytics and crash reports), Google AdMob (optional rewarded ads for free users), DeepSeek (content generation), RevenueCat (subscription management), Apple CloudKit (iCloud sync), Telegram (internal operational alerts). Our AI provider, DeepSeek, is based in China, so your scenario text may be processed outside your country of residence.

Children’s Privacy

PosterWords is suitable for general audiences and is not directed at children under 13. We do not knowingly collect personal information from children. Rewarded ads are optional, user-initiated, and not shown to Pro subscribers; they never appear during study or onboarding.

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leilei0091@icloud.com (response within 15 business days)

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