Privacy Policy

LanguageLearn Lingo · last updated 15 August 2026

What we do not collect

• No name, email address, phone number or account of any kind.
• No advertising identifier, and no advertising or analytics SDKs in the app.
• No contacts, no location, no device identifiers sent to us.
• No cross-app or cross-site tracking.

What stays on your device

Everything about your learning: which lessons you finished, your streak, coins, per-word scores, words you added yourself, and your settings. It is stored only in the app's own storage. Deleting the app deletes it. You can also erase it at any time from Profile → Delete all data.

What is sent to our server

The app talks to one server we run, at speedui.ai, for two things.

• Speech audio. To read a word or sentence aloud, the app sends that text and its language to our server, which has it synthesized by Google's Gemini text-to-speech and returns the audio. The audio is cached so the same sentence is only ever generated once, for everybody.
• Coaching features. A short encouragement after a lesson, an explanation of a wrong answer, an extra practice round, and naming the object in a photo. For these the app sends only structured fields — the language codes, the lesson title, the exercise question, the answer you gave, the words you are weakest on — and our server builds the request to Google Gemini. The app never sends free-form text of its own.
• Photos. Only if you use the photo-to-word feature. The chosen photo is downscaled and sent to our server, forwarded to Google Gemini to identify the object, and then discarded. We do not store it.

None of this is tied to an identity, because the app has none to send. Your progress, streak and word scores are never uploaded.

What our server records

• The phrases requested and their language, in the server log, so we can see which content is being generated and spot failures. These lines are not linked to a person or device.
• Your IP address, held in memory only, to rate-limit abuse. It is not written to disk by the app server and is discarded within the hour.
• Generated audio, stored on disk keyed by a hash of the phrase, language and voice — not by who asked for it.

Microphone and speech recognition

Speaking exercises use your device's own speech recognition. On iOS this is Apple's; on Android it is the recogniser your device provides, which on most phones is Google's and may process the audio on Google's servers under their privacy policy. We never receive your recorded audio — the app only ever sees the text your device transcribed, compares it to the expected answer, and discards it. The microphone is used only while a speaking exercise is on screen.

Third parties

• Google Gemini API — receives the text and photos described above, from our server, for speech synthesis and the coaching features.
• Apple / Google — the app stores handle downloads and any crash reporting you have opted into at the OS level. We do not add our own.
• Device speech recognition, as described above.

AI-generated content

Some text and all spoken audio in the app is generated by AI, and AI output can be wrong or inappropriate. Anything generated for you can be reported from inside the app — press and hold the item, or use Profile → Report content — and reports reach us with the offending text so we can correct or block it.

Children

The app is not directed at children under 13. It collects no personal information from anyone, so there is nothing we could knowingly collect from a child. If you believe a child has sent us a photo through the photo feature, contact us and we will confirm it has not been retained.

Your rights

Because we hold no identifiable data, there is no account to access, export or delete. To remove everything the app holds about you, use Profile → Delete all data or uninstall it. For anything else, write to us.

Changes

If this policy changes materially, the date at the top changes and the new version appears here before the change takes effect in a released build.

Contact

Questions or requests: hello@speedui.ai