Ten minutes a day
Tap the right word, build the sentence, spot the mistake. Tap “Why?” on a wrong answer and the AI explains it in your language – and your mistakes come back just before you'd forget them.
B1 Preliminary · B2 First · C1 Advanced
Polish your gem. Pass your Cambridge exam.
Ten-minute lessons, timed mock tests and marked Writing and Speaking for all three Cambridge exams. It feels like a game and works like a tutor.
Free to start · Android and web · iPhone coming to the App Store
Your gem
25%
Answer right to light the next facet.
One app, three exams.
Pick your exam and the whole app follows it: the lessons, the mock tests and your daily plan. Every mock test gives you a score on the Cambridge English Scale, the same scale your certificate uses.
Cambridge English Scale
B1 PreliminaryResults 120–170 · pass at 140
pass
- 10 Reading papers
- 4 Listening tests
- 12 Writing tasks
- 6 Speaking tests
- 20 lesson units
B2 FirstResults 140–190 · pass at 160
pass
- 8 Reading & Use of English papers
- 4 Listening tests
- 34 Writing tasks
- 7 Speaking tests
- 29 lesson units
C1 AdvancedResults 160–210 · pass at 180
pass
- 10 Reading & Use of English papers
- 4 Listening tests
- 16 Writing tasks
- 6 Speaking tests
- 20 lesson units
The lighter part of each bar is a result at the level below; the green line is the pass mark. Lozenge shows you where your mock tests land on it.
What's inside.
Over 2,000 exam questions, 740 recordings, 150 listening reels and an AI examiner for Writing and Speaking. Everything is original and written in the exam's format.
Mock tests and Exam day
Timed papers with the real parts and questions, a score on the Cambridge English Scale for each – or sit a whole test in one go, in the real order with breaks, and get one final grade.
A live AI examiner
Plus: a real spoken conversation with Anna, the examiner – or Part 3 with Tom, another candidate, like on the day. Then your speaking is marked on the official criteria.
Writing and Speaking, marked
Essays, emails and articles marked on the four official criteria, with corrections and a stronger version of your answer. Wrote it by hand? Take a photo. Speaking shows the words to practise saying.
Listening reels
150 short scenes with British voices and video: answer a question, then read the transcript and save new words. Plus full Listening tests at exam speed.
Exam guides
How to write each task and ace every Speaking part, card by card and read aloud – with model answers and the mistakes that cost marks.
Know your grade
Lozenge predicts the grade you'd get today, charts it after every mock test and tells you which paper gains you the most. Pick a goal; every Sunday you get your week in numbers.
For teachers
Create a class, share its code, and see each student's predicted score, weakest paper and when they last practised – never their answers.
In your language
The app speaks 16 languages, from Czech and Slovak to Turkish, Ukrainian and Vietnamese. The exam material stays in English, exactly as you'll meet it on the day.
Get Lozenge.
Pick where you learn. Your progress stays on your device.
Android
Download the app and install it straight from the file. Android 8.0 or newer.
Download APK Version 1.6 · 8 MBiPhone
Coming to the App Store. Until then, the web version works in Safari.
Open in Safari App Store: coming soonIn your browser
Nothing to install, on any computer or phone. Everything that's free in the app is free here.
Try it now Free · no account neededYour first lesson takes five minutes.
It runs in your browser. Everything that's free in the app is free here, and your progress stays on this device.