Terms of Service

Last updated: 2026-08-14

Welcome to Contextia ("the tool"), a language-learning reading tool built and run by an independent solo developer. By registering or using it — on the website or the iOS app — you agree to the following terms.

What the service does

The tool helps you look up words and analyze sentences while reading articles in the language you're learning, and build up a personal vocabulary notebook and notes. AI analysis relies on a third-party AI provider (DeepSeek / OpenAI / Claude / Gemini) API key that you enter yourself in Settings, on a limited free trial provided by the tool, or (iOS app only) on a Contextia Pro subscription — any costs from your own key are billed to you and are not the tool's responsibility.

Accounts

You need to register an account (username + password, Google sign-in, or Apple sign-in) to use the tool
Keep your password secure; if you suspect your account has been compromised, change your password or contact us as soon as possible
You may not use the tool for any illegal activity, or to attack or abuse the system's resources (e.g. hammering the API, mass account creation)
We reserve the right to suspend or terminate an account if we find it's being used in violation of these terms

Contextia Pro subscription (iOS app)

What you get: Contextia Pro unlocks unlimited use of the app's own house-hosted AI key, so you don't need to bring your own AI provider API key.
Title, length, and price: "Contextia Pro (Monthly)" is an auto-renewing subscription billed monthly. The exact price for your region is shown in the App Store at the time of purchase, and may change over time — any price change will be shown to you for confirmation before it takes effect, as required by Apple.
Billing and renewal: Payment is charged to your Apple ID account at confirmation of purchase. The subscription automatically renews for the same length and price unless you turn off auto-renew at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours of the end of the current period.
Managing or canceling: Subscriptions are managed entirely by Apple, not by us — we cannot cancel or refund a subscription on your behalf. You can manage or cancel anytime in your device's Settings → [your name] → Subscriptions, or in the App Store app. If you cancel, Pro access continues until the end of the period you already paid for.
Refunds: Refund requests are handled by Apple according to its own policies, not by us.
These subscription terms apply only to the iOS app. The website version has no paywall; it instead offers an optional, one-time, non-subscription way to support development directly, which is not a purchase of any feature or service.

Content ownership

The article content, vocabulary, and notes you upload, paste, or generate remain yours — the tool only stores and processes it on your behalf, doesn't use it for any other purpose, and doesn't claim any ownership over it.

Changes to the service

The tool is currently free and still under active development, so features may change, be added, or be removed at any time. We reserve the right to change the service or introduce paid features in the future, and don't promise the service will remain free or stay in its current form forever. We'll try to give advance notice of any significant changes.

Disclaimer

The tool is provided "as is." We're not responsible for service interruptions, data loss, the accuracy of AI-generated explanations, or any indirect losses arising from your use of the tool. AI-generated content is for learning reference only — use your own judgment about its accuracy.

Changes to these terms

We may update these terms from time to time; the updated version replaces the content on this page. Continuing to use the tool after an update means you accept the revised terms.

Contact

If you have any questions about these terms, contact: johnhuangyijun2002@gmail.com