Privacy policy

Last updated: 2026-10-22

• No account. You use Rio Tutor without registering. We do not collect your name, email or other personal data.
• Data stays on your device. Lessons, answers, progress, settings and your profile are stored locally on the device (in the browser storage on the web). Backups are files you export and share yourself.
• No analytics. The app contains no analytics SDKs. The only third‑party SDK that can collect data is the advertising SDK described below.
• Ads (Google AdMob). On iOS and Android the app shows two kinds of ads: one full‑screen ad once a day, when you first start a lesson that day (if it cannot load within a few seconds, you go straight to your lesson), plus optional rewarded videos in the Rewards section that you can choose to watch for +15 💎 (up to 4 per day). To make the daily ad appear quickly, the app may request it in advance when you open the app. The web version shows no ads. Ads are provided by Google AdMob (Google LLC / Google Ireland Ltd.), a third party. When an ad is requested, the Google Mobile Ads SDK may process your device's advertising identifier (IDFA on iOS, Advertising ID on Android) and other device identifiers, your IP address, basic device and app information, and how you interact with the ad (for example, whether it was shown, watched to the end or tapped), in order to deliver and measure ads and to prevent fraud. Google's use of this data is described at policies.google.com/technologies/ads.
• Your choices for ads. Where required by law (for example in the EEA, the UK and Switzerland), no ads are requested until you have answered Google's consent form. The form appears right before the first ad — when you start your first lesson of the day or tap your first video in Rewards, whichever comes first; if you decline, only non‑personalized ads are shown where permitted. You can change your choice later via “Ad privacy settings” in the Rewards screen. On iOS, the app asks for tracking permission (App Tracking Transparency) once, at the same moment, right before the first ad; until you allow it, your advertising identifier is not shared. You can also limit ad tracking at any time in your device settings (iOS: Settings → Privacy & Security → Tracking; Android: Settings → Google → Ads, or Settings → Privacy → Ads, to reset or delete your Advertising ID).
• Everything else stays on your device. Your progress, words, lessons and your 💎 wallet (crystals, rewards, purchases with crystals) are stored only on your device and are never sent to us or to Google.
• Your AI assistant. Lesson prompts are sent to an external AI assistant (ChatGPT, DeepSeek, etc.) only when you copy and paste them yourself. That service's own privacy policy applies to what you send there.
• Word translation. When you tap a word that is not in the lesson glossary, the app sends only that word or phrase to a public translation service (Google Translate or MyMemory) to show a translation. No other data is sent.
• Voice. Text-to-speech uses your device's built-in system voices.
• Microphone. Only if you choose to record a spoken answer; the recording is played back on your device and is not uploaded anywhere.
• Optional local AI (web only). If you configure a local Ollama server yourself, lesson requests go to that server address.
• Children. The app is intended for ages 13+ and is not directed at children. We do not collect personal data ourselves; ad requests are limited to content suitable for teens (rating “T”).
• Deleting data. Reset progress in the app, or delete the app / clear the site data.

Contact: margaritka251289@gmail.com