For bug reports, feature requests, or any question. Please include your device model and operating-system version so we can help faster.
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Answers to the most common questions about using Lengio.
Yes, on iPhone and iPad. It is free and takes about thirty seconds, and it is what the copy of your study progress will belong to — the first release reads from the server and uploads nothing, and uploads follow in a later one. The Android app does not have accounts yet.
There is no password. You sign in with a six-digit code emailed to you, with Sign in with Apple, or with Sign in with Google — whichever you prefer. If a sign-in code does not arrive, check your spam folder first, then email [email protected] and we will sort it out.
You can delete your account at any time under Settings → Account → Delete Account, or from lengio.app/delete-account if you no longer have the app.
Lengio is free to download and free to use every day, with no ads. It does need a free Lengio account — on iPhone and iPad today; the Android app does not have accounts yet — and there is a one-question age check the first time you open it. The free tier covers one language, the Beginner section of the lesson path, one practice session a day, seven AI Chat Coach messages in total, the first few conversation videos, three cultural notes, and the first 100 words of each category. Lessons are paced by lives rather than a daily count: you start with five, a wrong answer on a graded question costs one, one comes back every four hours, and finishing a review session gives one back.
Lengio Plus removes those limits and adds the rest: all 25 languages, the full lesson path beyond the beginner arc, the entire vocabulary catalogue, every conversation video, unlimited AI conversations, all six games, card customisation, backup export and automatic backups, voice selection, and your full statistics history.
Plus is available monthly, annually, or as a one-time lifetime purchase. Prices are shown in your own currency inside the app before you confirm anything, and any free-trial terms appear on the same screen.
Billing is handled entirely by the store you downloaded from, never by us. On iPhone and iPad Apple bills you — manage or cancel under Settings → your name → Subscriptions. On Android Google bills you — manage or cancel in Google Play → profile icon → Payments & subscriptions → Subscriptions. Subscriptions renew automatically until you cancel, and uninstalling the app does not cancel one.
Yes — Settings → Share Usage Data inside the app. Switching it off stops collection immediately and discards anything still queued on your device. Nothing in the app behaves differently either way.
Lengio records anonymous events like which screens are opened and which lessons are finished, so we can see what to build next. There is no name, email, advertising identifier, IP address, or location attached, and no third-party analytics SDK is involved. The full detail is in our Privacy Policy.
Most of Lengio works without a connection. Lessons, practice, games, reviewing vocabulary, the widget, and attaching your own photos all function locally once a language pack is downloaded.
A connection is required for: creating or signing in to your Lengio account, downloading a language pack or fresh content, streaming a conversation video, the AI speech partner (which reaches Google through a server we operate), the in-app image search, and app updates from the App Store or Google Play.
Open Lengio, go to Settings, and tap Language Packs. Select the language you want and tap Download. We recommend using Wi-Fi, as packs can be several hundred megabytes. Once downloaded, all content is available offline.
With Lengio Plus, yes — all 25 languages are unlocked and you switch between them from the language selector on the home screen. Progress, bookmarks, and daily streaks are tracked separately per language, so nothing is lost when you switch back and forth.
The free tier covers one language, which is the one you pick during setup. You can change it later, but doing so resets your study progress, so Plus is the way to genuinely learn two at once.
Custom card images are a Lengio Plus feature. On the free tier, tapping a word's picture shows a Custom images — Plus option instead.
With Plus, open any word's card and tap its picture. The menu offers Add from Library (or Replace from Library once an image is set), Search the Web, and Remove Image.
Images from your library are stored on your device and are never uploaded or shared. Search the Web opens Google Image Search in an in-app browser restricted to Google's own search pages, with SafeSearch switched on. Your search term and your IP address go to Google under Google's privacy policy; we never see the search or the results, and the picture you pick is saved only on your device.
On iPhone: long-press the home screen until icons begin to jiggle, tap the + button in the top-left corner, search for Lengio, and pick a widget size.
On Android: long-press an empty area of the home screen, tap Widgets, scroll to Lengio, then drag the size you want onto the screen.
The widget displays your word of the day and daily phrase and refreshes automatically. Exact steps vary a little between Android manufacturers.
Streaks reset if a day is skipped — but your vocabulary progress, bookmarks, and completed words are never deleted. You can continue exactly where you left off; the streak is simply a motivational layer on top of your real progress.
Go to Settings → Study → Words per Session inside the app and choose 10, 20, or 50. Lengio uses that number to pace how many new words each session introduces, and it fills the daily-goal ring on the Home screen.
Your learning data lives on your device, and once uploads are switched on in a later release a copy of your study progress will also sit on our server against your account — our Privacy Policy sets out exactly what is in that copy and how to switch it off. To remove it:
If your device backs up to iCloud (iPhone) or to your Google account (Android), Lengio data may be included in that backup. Manage it in your iCloud settings or in Android → Settings → Google → Backup.
Your Lengio account is deleted separately — in the app under Settings → Account → Delete Account, or by email if you no longer have the app. Full instructions, and what we keep afterwards, are at lengio.app/delete-account.
Purchases are processed by the store you bought from, and only that store can issue a refund — we have no ability to charge or refund you on either platform.
App Store: visit reportaproblem.apple.com, sign in with your Apple Account, find the Lengio purchase and select Request a Refund. Apple typically decides within 48 hours.
Google Play: visit your Google Play order history, find the Lengio purchase and choose Request a refund. Google offers self-service refunds within a short window after purchase; after that the request goes to Google for review.
Lengio requires iOS 17 or later on iPhone and iPad, or Android 8.0 or later on Android phones and tablets.
Progress is stored on the device, and accounts are on iPhone and iPad only for now, so it does not transfer between an iPhone and an Android phone — see the question below.
Not automatically. Lengio keeps your progress on the device, which is why it works offline. Your account holds your email address, your first name, your chosen languages and whether you have a subscription; a copy of your study progress is being added to it, so that a lost phone no longer means lost years — the first release reads from the server and uploads nothing, and uploads follow in a later one. Our Privacy Policy sets out exactly what is in that copy, what is deliberately kept out of it, and how to switch it off. Today, though, nothing moves between platforms: accounts are on iPhone and iPad only, and Apple's iCloud and Google's backup service each restore only to their own.
A Lengio Plus purchase does not carry across either — the App Store and Google Play are separate billing systems, and neither can see a purchase made in the other. If you bought Plus on one platform and have moved to the other, email [email protected] and we will do what we can within the limits the stores allow.
Lengio is rated 4+ on the App Store, carries a general-audience content rating on Google Play, and contains no objectionable content. Lengio asks for your year of birth the first time you open it, and it will not create an account for anyone below the minimum age where they are — 13 in most countries, and higher in several European ones. We do not market the app to children, and there are no features designed for young children.
Two features are worth a parent knowing about. The AI speech partner is age-restricted, asks for your agreement before it opens for the first time, and generates its replies automatically — no person reviews them before you see them. There is a report control inside the chat, and if a conversation turns to self-harm the app shows emergency resources instead of sending the message. Search the Web for card images opens Google Image Search with SafeSearch switched on, restricted to Google's own search pages — but SafeSearch is Google's filter rather than ours, and no filter is perfect.
Absolutely. Send language and feature suggestions to [email protected] with "Feature Request" in the subject line. We read all submissions, though we can't commit to timelines for specific requests.