Otto weaves your target language into real articles at the level you choose, so you're always learning but always understanding. Try it here: change the language and level, then tap the green words.
Workbooks you left school to get away from. Native content you can't follow well enough to enjoy. Otto is the ground in between, and it moves as you improve.
Language research has said it for decades, most famously in Stephen Krashen's input hypothesis: you acquire a language from material that is just slightly beyond your level, not far beyond it. Otto engineers exactly that. The content stays readable because the language you're learning and the language you speak are always perfectly balanced for your level: enough of theirs to keep you learning, enough of yours to keep the meaning intact.
Otto swaps the most frequent words first: the 200 most common words carry a huge share of everyday text. As your level rises, rarer words join. Every word you meet arrives inside a sentence you understood, which is how meaning attaches, and every word you save keeps its sentence with it.
Memory research consistently finds that testing yourself beats re-reading. So Otto asks before it tells: tap a word you've met before and it blurs the answer until you've tried to recall it. Games and end-of-article tests are built from your own word bank, and your tutor can test you on exactly what you read.
The free app already has everything the method needs: real articles at your level, tap to translate, 20 saved words a day, games, streaks and tests. Pro is for two kinds of reader: the ones who outgrow those limits, and the ones learning with a tutor.
| OttoFree, always | Otto Pro€3.59 a month | |
|---|---|---|
| Real articles at your level | ✓ | ✓ |
| Tap any word to translate | ✓ | ✓ |
| Words you can save a day | 20 | Unlimited |
| Games built from your words | ✓ | ✓ |
| Streaks, goals and tests | ✓ | ✓ |
| Detailed progress charts | – | ✓ |
| Whole books from the bookshop | – | ✓ |
| Link with your tutor | – | ✓ |
| Tutor assignments and tests | – | ✓ |
| First access to new features | – | ✓ |
You can move to Pro from inside the app the day the free limits actually get in your way. Most people never hit them.
Between lessons is where languages are won and lost. Otto gives your students something worth opening every day, and gives you the controls: what they read, what they're tested on, and what you see.
Every student, no cap on numbers, no contract and no commitment. Run it across as many classes as you like for a full academic year, then decide at the end of it.
After the free year, from €1 per student per month. Start your free yearBuild a lesson from Otto articles, set the level each one presents at, then go live and read through it together. Tap any word to reveal it as you go. Every student still reads at their own level in their own app afterwards.
Otto publishes fresh articles daily across six languages, already levelled. There is always something current to set, and nothing for you to prepare or write.
Send any Otto article as an assignment with the test built in: comprehension, gap fill, sentence order, word match, spelling, plus your own written questions. Or send it as pure reading, no test attached.
Drills built from the words that student actually looked up in your assignments, not a generic list. Cycle mode repeats until every word is right.
Name the book, page and exercises and Otto tracks it. Students answer in the app or tick the work off to bring to class, and your book library suggests itself for the next student.
Set the same article or test for a whole class at once, then still see every student's result separately. Add and remove students as your groups change.
Scores by section, written answers you mark yourself, comments back to the student, and the words they looked up while working, so you know what was hard before the lesson starts.
A student can run their app in Spanish and still have you teach them French. You set the level and the language their assigned work is read and tested in.
A direct thread with each student and a notification the moment work is submitted. No more chasing homework across three different apps.
The portal runs in any browser, with nothing to install and nothing to configure, and most tutors are assigning work within a few minutes. If you would rather be walked through it, or you are rolling Otto out across a department, we will set it up with you and stay with it for as long as you need.
Open the tutor portal in your browser and sign in with your Otto tutor account.
Students link to you from their app. Set each one's language, level and usual lesson day; due dates default to their next lesson.
Pick an article or build a test in a couple of minutes. Results, marking and messages all come back to the same screen.
Running Otto across a class or a whole department? We'll help you set up tutors, groups and lesson schedules, and talk through pricing that makes sense for education.
Otto's readers open the app to spend real time with real articles. Sponsored content lives inside that reading, not around it.
Your story written as an Otto article, read with the same swapped-word mechanic and clearly labelled. Readers spend minutes with it, not milliseconds.
Short video placements between feed items, capped per session so they stay welcome.
Reach learners by the language they are learning and the level they read at, across six languages.
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