How Fleksja works
Fleksja is an app to learn Polish words and train the endings that change with the case. Here is the problem it tackles, how it works, and what we are still testing.
Where things stand: Fleksja is still in development and not in the app stores yet. The practice demo on the main page already works, so you can try the exercise format. Before building the rest, we want to check that learners really want this, and your opinion is part of that.
The problem: every word has an ending
At beginner and intermediate level, building a sensible sentence in Polish is hard. Every word needs its own ending, and you have to choose it while you are still deciding what to say. That creates friction.
Learners usually end up in one of two places: long pauses and mistakes, or speaking only in the dictionary form of each word (the nominative). The second one works, people understand you, but it stays limited: you can name things and ask for them, but you cannot say much.
So the real challenge of Polish is getting the cases to come out on their own. That takes a lot of practice, together with a steady supply of new words to practise on.
Our approach: two skills, trained a little every day
Fleksja trains the two things that hold learners back, vocabulary and endings, in short sessions with practice aimed at your own weak spots.
1. Learn new words with flashcards
The flashcards start from the basics and move toward more abstract, more complete vocabulary, following the order of the usual study books. Each word comes with its forms (verbs as aspect pairs), so you meet the endings together with the word. Free, from A0.
2. Practise the ending in a sentence
Short sentences and longer ones, each with a gap. You choose the right ending from four options, and the wrong options are the mistakes learners actually make.
Nie mam ___ .
- kot
- kota
- kotu
- kotem
Every sentence comes with a grammar explanation of why that ending is the right one, so you do not just memorise answers, you understand the rule behind them.
3. It keeps track of your mistakes
When you get an ending wrong, the app takes note and brings you similar exercises later, right before you would forget. It also keeps a record of your progress, so you can see what has improved and what still trips you up.
Grammar always within reach
Inside the app there are whole sections dedicated to grammar in depth, with interactive illustrations and review cards. Every rule stays at hand, at the moment you need it.
The AI coach
The AI coach monitors your performance. It sees which cases and endings you get right and which keep tripping you up, and adapts your training to work on those first. Every week you get a progress report with your weakest endings.
Free, Plus and Premium
You can start for free and go further when you are ready.
Free
Learn words and practise the endings.
- 2 practice sessions a day: flashcards and drills
- Every word with all its forms
- Spaced repetition
- Grammar sections with interactive illustrations and review cards
- Light ads; watch a short video to unlock one more session
Plus
Practise as much as you want.
- Everything in Free
- Unlimited sessions, all 7 cases, singular and plural
- Verb conjugation drills
- A guided path from A0 to B2
- Progress stats and streaks
- Offline mode, no ads
Premium
A coach that knows your weak spots.
- Everything in Plus
- AI coach that tracks your performance and adapts your training
- B1 and B2 exam preparation, with practice simulations
- Weekly progress report with your weakest endings
- More exercise types: mixed cases, adjective agreement, numerals, prepositions
- Your own decks, built around the areas that interest you (work, travel, your course…)
Prices and the 14-day free trial are on the main page. Fleksja is still being built: nothing is charged today, and reserving a plan only means we email you at launch.
Why we think it can work
- Endings are practised inside sentences, which is where the mistake actually happens, not in isolated tables.
- The wrong options are real learner mistakes, so you learn to tell apart the forms you tend to confuse.
- Every answer is explained, so you build the rule, not just a memory of the answer.
- Repetition follows your own errors, so practice time goes where it is needed.
- Sessions are short, built for a few minutes a day on your phone.
These are hypotheses, not proven results. That is exactly why we are testing the idea before building everything.
Who it is for
- Learners from A0 to B2 who understand the case tables but freeze when they have to build a sentence.
- Anyone who wants to learn new words and make the endings automatic.
- Anyone who prefers a few focused minutes a day over long study sessions.
What we would like to know from you
If you are learning Polish, any reply helps, even one line:
- Which case or ending trips you up most?
- How do you practise endings today, and what is missing?
- Would you use something like this? If not, why?
Write to [email protected]. Or leave your email on the main page and we will tell you once, when there is something to try.