Privacy Policy
Last updated: June 19, 2026
1. Overview
This Privacy Policy explains how Dialex ("we", "us") collects, uses, and protects Personal Information when you use the Dialex Service — including our website at dialex.chat, our web application at app.dialex.chat, and related services (together, the "Service").
By using the Service, you agree to the practices described here.
2. Information we collect
Personal Information: account data such as your email address, authentication identifiers, and basic profile information stored through our authentication provider.
Usage data: message counts, speaking minutes, subscription status, and feature usage needed to enforce plan limits and operate the Service.
User Data: practice messages, scenario progress, vocabulary, settings, and learning progress — stored locally in your browser and optionally synced to your account in our cloud database when you are signed in.
Analytics data: product events (e.g. onboarding completed, conversation started), conversation metrics, and aggregated usage statistics.
AI request logs: token counts, request type (chat, text-to-speech, speech-to-text), estimated cost, and technical metadata — stored server-side for billing observability and abuse prevention.
Technical data: browser type, approximate timestamps, and error logs necessary to operate the Service.
3. How we use information
- To provide and maintain the Service, including AI conversations, voice features, and cloud sync.
- To enforce free-tier limits, rate limits, and account security.
- To measure product performance, retention, and costs (internal analytics).
- To respond to support requests and comply with legal obligations.
4. Third-party services
We rely on trusted third-party providers to operate the Service. These currently include:
Supabase — authentication, database, and server-side processing. Personal Information and User Data are handled according to Supabase's policies and our security configuration.
Trusted AI providers (currently OpenAI) — chat, text-to-speech, and speech-to-text. Only the information necessary to generate AI responses is securely transmitted to these providers. We do not use your conversations to train public AI models. Each provider's handling of data is subject to its own privacy policy.
We may add or change providers over time as the Service evolves. We will update this Policy when material changes occur.
We do not sell your Personal Information to third parties.
5. Cookies and similar technologies
Cookies and similar technologies (such as local storage) may be used to maintain authentication, remember your preferences, improve security, and operate the Service.
You can control cookies through your browser settings. Disabling them may limit some features.
6. Local storage
The Web Application stores conversation history, settings, and progress in your browser (local storage) for offline access and performance. Session tokens are also stored locally to keep you signed in.
When cloud sync is enabled, your User Data is uploaded to your private account record.
7. Data retention
We retain account and usage data while your account is active. You may request deletion by contacting us.
AI request logs and analytics may be retained in aggregated form for operational and security purposes.
8. Security
We use industry-standard measures including HTTPS, authenticated API access, server-side protection of credentials, access controls on stored data, and rate limiting. No method of transmission or storage is 100% secure.
9. Your rights
Depending on your location, you may have rights to access, correct, delete, or export your Personal Information, or to object to certain processing. Contact us to exercise these rights. We will respond to requests within a reasonable timeframe and in accordance with applicable law.
You can sign out and clear local data from Settings in the Web Application. To request account deletion, email hello@dialex.chat.
10. Children
The Service is not directed at children under 13. We do not knowingly collect Personal Information from children under 13 without parental consent.
11. International transfers
Your Personal Information may be processed in countries where our service providers operate (including the United States). We take steps to ensure appropriate safeguards where required.
12. Changes
We may update this Privacy Policy. The "Last updated" date will reflect changes. Continued use of the Service after updates constitutes acceptance.
13. Contact
Dialex is operated by Nikita Mikhailov (CUIT 27-63145418-1), Argentina.
Privacy and data requests: hello@dialex.chat
Website: https://dialex.chat
Web Application: https://app.dialex.chat