Privacy Policy

We aim to collect as little personal information as possible. Depending on the product and platform, we may collect the following categories of data:

• Information you provide. Details you submit directly, such as when you contact support, sign up for a newsletter, or create an account (name, email address, and any content you send us).
• Automatically collected data. Device model, operating system version, language, region, app version, crash logs, performance metrics, in-app events, and non-precise location inferred from IP address.
• Identifiers. Advertising identifiers (such as the Android Advertising ID or Apple IDFA), pseudonymous installation IDs, and cookies or similar technologies on our websites.
• Gameplay & usage data. Progress, preferences, settings, and aggregate interactions used to improve our products.

We use the information described above to:

• Operate, maintain, and improve our apps, games, and services.
• Diagnose crashes, fix bugs, and monitor performance and stability.
• Personalize content, remember preferences, and save progress.
• Serve and measure advertising, including limited or non-personalized ads.
• Communicate with you about updates, support requests, or important notices.
• Detect, prevent, and address fraud, abuse, and security issues.
• Comply with legal obligations and enforce our terms.

Some of our apps and games display advertisements provided by Google AdMob. AdMob may collect and process device identifiers, advertising IDs, IP address, and interaction data to serve and measure ads, including personalized ads where permitted.

• On iOS, we request permission through App Tracking Transparency before any tracking occurs. If you decline, only non-personalized ads are shown.
• On Android, you can reset or opt out of ad personalization from your device's Google settings (Ads).
• In the EEA, UK, and Switzerland, we (or our SDK partners) present a Google- certified consent message so you can accept or refuse personalized ads.

Learn more in Google's Advertising Privacy & Terms.

We use analytics tools (such as Google Analytics, Firebase Analytics, and similar first- and third-party services) to understand how our products are used and to improve them. These tools may collect device information, usage events, and pseudonymous identifiers. Data is used in aggregate and is not used to identify you personally.

We rely on trusted third-party providers to help operate our products. These services process data under their own privacy policies and may include:

• Google Play Services, Google AdMob, Firebase, Google Analytics
• Apple App Store and related Apple services
• Crash reporting and performance monitoring providers
• Hosting, storage, and content delivery providers
• Email and customer support platforms

We are not responsible for the privacy practices of third-party services, and we encourage you to review their policies.

Our products are not directed to children under the age of 13 (or the equivalent minimum age in your jurisdiction), and we do not knowingly collect personal information from them. Where a product is designed for a mixed audience, we apply additional safeguards such as non-personalized ads and reduced data collection. If you believe a child has provided us with personal information, please contact us and we will delete it.

We use reasonable administrative, technical, and physical safeguards designed to protect information from unauthorized access, disclosure, alteration, or destruction. This includes encryption in transit, restricted access, and reputable infrastructure providers. However, no method of transmission or storage is 100% secure, and we cannot guarantee absolute security.

If you are located in the European Economic Area, the United Kingdom, or Switzerland, you have rights under the General Data Protection Regulation (GDPR) and similar laws, including:

• Access to the personal data we hold about you.
• Correction of inaccurate or incomplete data.
• Deletion of your personal data ("right to be forgotten").
• Restriction or objection to certain processing.
• Data portability where technically feasible.
• Withdrawal of consent at any time (without affecting prior processing).
• The right to lodge a complaint with your local supervisory authority.

Residents of California and other U.S. states with applicable privacy laws have similar rights to access, delete, and opt out of the sale or sharing of personal information. We do not sell personal information.

To exercise any of these rights, contact us at Plyerstudios@gmail.com.

We retain personal information only for as long as needed to provide our products, comply with legal obligations, resolve disputes, and enforce our agreements. Aggregated or anonymized data, which cannot reasonably be used to identify you, may be retained indefinitely for analytics and product improvement.

We may update this Privacy Policy from time to time to reflect changes in our products, technology, legal requirements, or for other operational reasons. When we make material changes, we will update the "Effective Date" above and, where appropriate, provide additional notice. Your continued use of our products after the changes take effect constitutes acceptance of the updated policy.

Applies to the LanLan app (Android) and lanlanchinese.com. Last updated: November 1, 2026.

By using LanLan you agree to these terms and to the YouTube Terms of Service.

Your data

The LanLan app has no account and no server of its own. Your saved words, flashcards, review progress, watch history, goals and settings are stored only on your phone (and in your own Android backup if you turned that on). Plyer Studios never receives them; deleting the app deletes them. The website lanlanchinese.com is separate: it is hosted by Cloudflare, and the only things it stores are the weekly video vote and the iPhone waitlist, both described below.

YouTube

LanLan plays videos with the YouTube API Services, in YouTube's own embedded player. YouTube may collect data when you watch, as described in the Google Privacy Policy. LanLan does not access, store or share YouTube data about you; you can review Google account access at https://myaccount.google.com/permissions. YouTube's player keeps cookies and similar data in LanLan's private storage on your phone.

Signing in to YouTube (optional). If YouTube's player won't play videos and asks you to confirm you're not a bot, LanLan offers to let you sign in to YouTube inside the app. Google's own sign-in page opens in LanLan's built-in browser: you type your details into Google, not into LanLan, and LanLan never sees, stores or sends your password or account details. The sign-in stays in LanLan's private storage on your phone, is never included in Android backups, and lets YouTube's player know it's you. While you're signed in, Google services in LanLan (YouTube's player and, for free users, Google ads) may recognise your account, as described in Google's Privacy Policy. Sign out any time in Me, or uninstall LanLan.

Videos belong to their creators and watching is always free. Creators can ask us to remove a video: https://lanlanchinese.com/dmca. To hide removed videos quickly, the app downloads a public list of removed videos from GitHub; no information about you is sent.

The weekly video vote (lanlanchinese.com)

On lanlanchinese.com you can vote for the kind of videos added next Sunday. To count each phone once, your browser keeps a random ID and the category you picked (in its local storage). For each vote we store one record: the week, the category, that random ID, the time of the vote, and a salted, one-way hash of your network (IP) address, used so that one network can't vote more than 5 times a week. The hash is erased once that week's vote has closed; the rest of the record is kept so the weekly results can be counted. No name, email or account is involved.

The website and the vote run on Cloudflare (Cloudflare Pages, with the votes in a Cloudflare D1 database). Cloudflare is our hosting provider and processes these requests on our behalf, including your IP address while it delivers the site, as described in the Cloudflare Privacy Policy.

The iPhone waitlist (lanlanchinese.com)

If you leave your email address to hear when LanLan is on iPhone, we store that address, which app it is for and when you signed up. We use it for exactly one thing: one email when the iPhone version is out. After that email the whole list is deleted (Cloudflare's automatic database backups expire within 30 days). No newsletter, no ads, and we never sell or share it. Only Plyer Studios can read the list: the website can only add to it. To stop spam we also keep a salted, one-way hash of your network (IP) address for one day (one network can sign up at most 5 times a day); after that day it is erased. The list is stored in the same Cloudflare D1 database as the vote, and we send the email ourselves, with no mailing service. To be removed earlier, write to Plyerstudios@gmail.com and we delete your address.

Ads, purchases and other services

• Free users may see ads from Google AdMob, as described in the Advertising section above. Where the law requires it (for example in the EU and UK), LanLan asks for your consent before any ad is shown, and you can change your choice at any time in the app under Me → Privacy choices (ads). Premium users see no ads.
• Premium is sold through Google Play as a yearly or monthly subscription or a one-time purchase. New subscribers get a free trial; if your Google account has already had one, the app shows the price you will pay instead. Prices are shown before you buy. Subscriptions renew automatically until you cancel in Google Play (Payments & subscriptions). Cancel before the renewal date, or any time before the free trial ends, and you won't be charged for the next period. If notifications are on, LanLan reminds you 2 days before your trial ends. Refunds follow Google Play's refund policy. Google Play processes payments; we only learn whether your account owns Premium.
• The optional LanLan voice is a model file downloaded from GitHub; it runs on your phone and sends nothing anywhere. Reminders are scheduled on your phone.

Learning content and use

Subtitles, translations, pinyin and word explanations are made with speech recognition, dictionaries and AI and can contain mistakes. LanLan is a learning aid, not a certified course. Don't reverse engineer, resell or misuse the app. LanLan is provided "as is"; to the extent the law allows, Plyer Studios is not liable for indirect damages from using it. LanLan is not directed to children under 13.

If you have questions or requests about this Privacy Policy or our data practices, please reach out to us at Plyerstudios@gmail.com. We aim to respond within a reasonable timeframe.