Last Updated: April 25, 2026

1. Introduction

Welcome to Lexicon ("we," "our," or "us"). We are committed to protecting your privacy and ensuring the security of your personal information. This Privacy Policy explains how we collect, use, store, and share your data when you use the Lexicon mobile application (the "App").

By downloading, accessing, or using the App, you acknowledge that you have read and understood this Privacy Policy. If you do not agree with the practices described herein, please do not use the App.

2. Information We Collect

2.1 Information You Provide

• Username. During your use of the App, you may be asked to provide your name in a chat conversation. Providing your name is entirely optional and is used solely to personalize your learning experience.
• Email Address. In future versions of the App, you may be asked to provide an email address to create and manage your account.
• Chat Content. When you interact with AI-powered chatbots within the App, the messages you send and receive are collected and stored on our servers.
• Voice Data. If you choose to use the voice input feature, the App uses Apple's Speech Recognition technology (SFSpeechRecognizer) to convert your speech to text. Your voice recordings are transmitted to Apple's servers for processing. The resulting text is then used as chat input within the App. We do not store your voice recordings on our servers — only the transcribed text is retained as part of your chat history. Use of the voice input feature is entirely optional.

2.2 Information Collected Automatically

• Device Information. We may collect general information about your device, such as device type, operating system version, and unique device identifiers, solely for the purpose of ensuring App functionality and compatibility.
• Usage Data. We collect anonymized usage analytics to understand how users interact with the App and to improve its features and performance.
• Purchase Data. If you make in-app purchases or subscribe to premium features, anonymized transaction data is collected to manage your subscription and analyze purchase trends.
• Crash and Performance Data. We automatically collect crash reports and performance diagnostics, including device model, operating system version, app version, stack traces, and error logs. This data is used solely to identify and fix technical issues.

2.3 Information We Do Not Collect

We do not collect precise geolocation data, contacts, or photos. We do not store voice recordings on our servers (voice data is processed by Apple and only the resulting text is retained). We do not use cookies or tracking technologies for advertising purposes.

3. How We Use Your Information

We use the information we collect for the following purposes:

• Providing the Service. To deliver AI-powered language learning conversations, personalize your experience, and maintain your chat history so you can continue learning sessions.