Language Learning, Reimagined
The language app that grows with you.
Multilingual (audio) flashcards with spaced repetition and AI to allow you to learn as efficiently as possible. Minimalist and distraction free. Bring your own content if you want.
What makes language stick? Repetition, personalized input, and motivation.
Consistent repetition, input tailored to your level and interests, and the motivation to keep going — Flexling is built around all three.
Repetition that fits your day
Short, frequent encounters with the same sentences beat rare cramming and repetition is key but staying consistent is hard. Flexling allows you to repeat the most important things with state of the art spaced repetition and the audio review lets you rehearse flexibly to fit into your busy day.
Personalized Input
Instead of learning things you do not care about we allow you to modify your curriculum. Add your own sentences or let AI create them for you. Every learner is different – your study material should be too.
Motivation and Progress Tracking
Learning a language is hard and so is staying motivated sometimes. Flexling tracks detailed statistics about your learning progress like how many words you have already learned. This keeps you motivated.
Two ways to review. Choose how you learn best.
Same sentences, different muscle memory — switch between listening-first audio and typing-first full review anytime.
Full review
Type your translation for each target language. After you submit, you see a character-level diff: correct text in green, mistakes highlighted, and anything you skipped in muted text — plus an accuracy score.
Good morning, how are you?
Ask any question. Remember the answer.
Ask grammar, line up useful phrases, or follow a learning rabbit hole. The chat can draft cards from the conversation — you just tap to add. Creating new flashcards has never been easier.
Watch your skills grow over time.
See exactly how your vocabulary expands week by week. Detailed analytics show your streak, words learned per language, and study habits — so you always know how far you've come.
Know What You Know
Track precisely which words you already know and how much progress you have made over days, weeks and months — broken down by language if you study more than one.
Feel Your Progress
See exactly what words you learned recently and stay motivated as your vocabulary expands.
Click any word to see the sentences you learned with that word
Session Snapshot
After every review, see exactly what you accomplished: repetitions, new words, and time spent — all updated live the moment you finish.
Everything You Need to Learn Faster
Flexling combines the best of audio learning, AI tutoring, and memory science into one seamless experience that adapts to your busy life.
Audio Based
Learn while commuting, exercising, or cooking. No screen required — just listen, repeat, and absorb.
Self Driven and Flexible
Add your own sentences or ask AI to create them for you if you want. Or don't. There are smart defaults too.
Instant Feedback
Ask any vocabulary or grammar question anytime. Our AI tutor explains nuances, alternatives and usage. And for any question you ask more flashcards are automatically created for you to remember.
All-in-One
No more switching between dictionaries, ChatGPT, and flashcard apps. Instead spend your time learning. Everything you need in one place.
Spaced Repetition
Remember up to 10x more with scientifically-proven algorithms that show you cards exactly when you need them.
Comprehensible Input
Every sentence is anchored in a language you already know. You stretch toward the translation, keeping difficulty challenging but never frustrating.
Flexible Pricing
Free
Perfect for getting started
- 150 sentences per month
- 10 custom sentences per month
- 1 course
- 5 chat messages per month
- Detailed statistics
Basic
Everything you need to learn one language.
- Unlimited ready-made sentences
- 300 custom sentences per month
- 1 course
- 100 chat messages per month
- Detailed statistics
Pro
For maximum flexibility and polyglots.
- Unlimited ready-made sentences
- 1,000 custom sentences per month
- Up to 10 courses
- 400 chat messages per month
- Up to 5 languages per course
- Detailed statistics
Compared with:
Traditional Courses
What you get:
Frequently Asked Questions
Everything you need to know about Flexling
What is Flexling?
Flexling is a language learning app that adapts to your needs. Unlike traditional apps, you can learn hands-free while commuting, exercising, or doing chores using the audio mode.
It also allows you to add your own content.
How does Flexling work?
Flexling has two learning modes: an audio mode and a full review mode.
In audio mode, flashcards play automatically: first a sentence in a language you already know, then you get time to think of the translation, then the app plays the sentence in the language you're learning.
In full review mode, you practice typing your translations and get instant feedback on spelling.
What makes Flexling special is that if you don't understand a sentence or have any question, you can ask the AI — like "How can I say this more politely?" or "Give me 3 more examples with this verb in a different tense." — and it automatically creates new flashcards with audio for you.
Note: We generate natural-sounding audio using state of the art text-to-speech technology.
Can I add my own sentences?
Absolutely! Flexling will automatically create flashcards you ask for through the chat. More methods to add cards are on their way.
Are we missing a method that you would like to use? Let us know and we will try to add it.
How long does it take to get fluent?
Fluency depends on many factors: the language, your native language, daily practice time, and learning methods.
The goal of Flexling is to give you all the tools you need to learn it as fast as possible. For instance Flexling teaches you new words in the order they appear most commonly. This way you can become fluent faster in more contexts because you learn the most frequent words first.
However, Flexling is not a full language course but rather the most efficient companion to one. If you already know the basic grammar or are currently doing a course, Flexling is likely the right app for you.
What languages does Flexling support?
You can learn English, Spanish, French, German, Greek, Italian, Portuguese (Brazil), Russian, Hindi, Chinese (Simplified), Japanese, Vietnamese, Swedish, Finnish, and Dutch in Flexling, with more languages being added regularly.
Is your language not supported? Let us know and we will try to prioritize it.
Why is Flexling a subscription?
Running AI models for voice generation and intelligent tutoring has ongoing costs. You can try it for free and see if it works for you.
Users have reported that it saves them a lot of time because they no longer have to learn things they don't find important, Flexling makes creating flashcards way easier and because they can learn on the go.
Is Flexling free?
Flexling offers a free tier so you can try it. Unfortunately, we cannot offer it completely free as we have to cover our running costs. If you need higher limits you can upgrade to our Basic or Pro plans.
Where do your sentences come from?
A lot of our sentences are from Tatoeba's massive dataset, released under a CC-BY License.
Some of the sentences have been created by us.
Can I download Flexling as an app?
You can install Flexling as a Web App right now! This gives you an app-like experience and home screen access. We're also working on native iOS and Android apps that will be available in the app stores soon.
Support & Giving Back
10% for Good
When you subscribe to Flexling, you're not just investing in yourself. We donate 10% of our earnings to highly effective charities recommended by GiveWell.
Start Learning Your Way
Install Flexling on your device for quick access anytime. Learn on your commute, during lunch, or before bed.
Works on iOS, Android, and desktop