Privacy Policy for Langlets

Last updated: July 16, 2026

Introduction

Welcome to Langlets ("we," "our," or "us"). We are committed to protecting your privacy and being transparent about how we handle information when you use our language learning application. This policy explains what we collect, why we collect it, who we share it with, and what control you have over it.

Information We Collect

Account Information

On the web, you can browse courses and lessons without an account, and we collect no account information from you. An account is needed for features that are tied to you personally — saving words, tracking progress, and creating content — and the Langlets iOS app asks you to sign in when it starts. If you create an account, either with an email address and password or by signing in with Apple, Google, or GitHub, we collect and store:

• Your email address, which identifies your account and is used to send confirmation and password reset messages
• Your password, stored only as a salted cryptographic hash — we never store it in readable form
• If you use Apple, Google, or GitHub sign-in: the name of that provider and the user identifier it assigns you

We do not store your name. Sign-in providers may send us your name as part of the sign-in response, but we discard it and it is never written to our database. We do not collect your phone number, physical address, contacts, photos, or location.

Learning Data

Langlets saves your learning progress on our servers so that it is available across your devices. This data is linked to your account and includes:

• Vocabulary words and translations you save for review
• Lessons and activities you have completed, and a log of your activity within them
• Your experience points, daily streak, and most recent activity date
• Your chosen learning language and app preferences
• Any courses, lessons, or activities you create

Microphone and Voice

The pronunciation practice activity uses your microphone, and only while that activity is active and you have started a recording. Audio is streamed to the Microsoft Azure Speech service, which returns a real-time transcript so we can score your pronunciation. We do not record, store, or retain your voice, and Azure processes the audio to service the request rather than to retain it. Only the resulting score is kept with your progress. Your device will ask for microphone permission before this happens, and the rest of the app works without it.

Analytics Information

We use Microsoft Clarity, a user behavior analytics service provided by Microsoft Corporation, to help us understand how users interact with our application. Microsoft Clarity may collect the following information:

• Device and browser information (browser type, operating system, screen resolution)
• Usage patterns and interactions within the app (clicks, scrolls, page views)
• Session recordings and heatmaps of user interactions
• IP address (which may be used to determine general geographic location)

We do not send your email address or any account identifier to Microsoft Clarity. We also use Cloudflare Web Analytics, which measures aggregate page traffic without using cookies and without fingerprinting visitors.

How We Use Information

We use the information described above only to:

• Create and secure your account, and sign you in
• Send transactional messages such as email confirmation and password resets
• Save your progress, saved words, and preferences, and build personalized review sessions
• Score your pronunciation in practice activities
• Improve the user experience and functionality of Langlets
• Identify and fix technical issues, and optimize performance and design

We do not use your information for advertising, and we do not send marketing email.

We Do Not Track You

We do not track you as that term is defined by Apple's App Tracking Transparency policy. We do not link data collected in Langlets with third-party data for advertising purposes, and we do not share your data with data brokers. Langlets contains no advertising networks and no attribution or ad-measurement software, and it never accesses your device's advertising identifier (IDFA). The analytics described above are used solely to understand and improve Langlets itself.

Information Sharing

We do not sell your personal information and we do not share it for advertising. We share limited information with the service providers that make the app work:

• Microsoft — Clarity analytics, and the Azure Speech service used for pronunciation scoring
• Cloudflare — traffic delivery and cookieless web analytics
• Apple, Google, and GitHub — only if you choose to sign in with them, and only to authenticate you
• YouTube — lesson videos are streamed from YouTube's embedded player, so Google may receive your IP address and set cookies under its own privacy policy

We may also disclose information if required to do so by law, or to protect the rights, safety, and security of our users and our service.

Data Retention and Security

We keep your account information and learning data for as long as your account exists. When you delete your account, your account record and the learning data attached to it — saved words, progress, activity logs, statistics, and content you created — are deleted along with it. We take reasonable technical and organizational measures to protect against unauthorized access to our systems, including encrypted connections and hashed passwords. No method of transmission or storage is completely secure, and we cannot guarantee absolute security.

Third-Party Services

Microsoft Clarity

Our app uses Microsoft Clarity for analytics purposes. Microsoft Clarity's collection and use of data is governed by the Microsoft Privacy Statement, which can be found at: https://privacy.microsoft.com/en-us/privacystatement

You can opt out of Microsoft Clarity data collection by visiting: https://clarity.microsoft.com/terms

Your Rights and Choices

You have control over the information you give us. You can:

• Browse the Langlets website without creating an account at all
• Access and update your account details from your account settings
• Delete your account at any time from your profile page, using "Delete my account" — this permanently removes your account and the learning data attached to it, including saved words, progress, XP and streaks, content you created, and any access tokens you issued to connected apps. You can also contact us and we will delete it for you
• Request a copy of your personal information, or ask us to correct it, by contacting us
• Decline or revoke microphone permission in your device settings, which disables only pronunciation practice
• Opt out of Microsoft Clarity data collection using the link provided above
• Use browser settings to disable cookies

Depending on where you live, you may have additional rights under laws such as the GDPR or the CCPA, including the right to object to or restrict processing and the right to data portability. Contact us at the address below and we will honor them.

Children's Privacy

Langlets is not directed to children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child under 13 has created an account, please contact us and we will delete the account and its data.

International Users

Langlets may be accessed by users worldwide. Your account information, learning data, and analytics data may be transferred to and processed in countries other than your own, including by the service providers listed above, in accordance with their privacy practices. Langlets behaves the same way in every country and region.

Changes to This Privacy Policy

We may update this privacy policy from time to time to reflect changes in our practices or applicable laws. We will post any changes on this page and update the "Last updated" date above. We encourage you to review this privacy policy periodically.

Contact Us

If you have any questions about this privacy policy or our privacy practices, please contact us at:

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This privacy policy is effective as of the date listed above and applies to all users of the Langlets application.