Stop guessing Polish endings.
You understand the cases. Then you have to say it out loud: kot, kota, kotu, kotem? Fleksja makes you produce the right form, again and again, until it comes out without thinking.
- Free flashcards
- Drills for all 7 cases
- Spaced repetition
The rules make sense. Using them is the problem.
Cases aren't hard to understand. They're incredibly hard to actually use.
You can recite the table, but mid-sentence your brain goes blank and you pick an ending at random.
I read the definitions, closed the book, and nothing stuck.
Reading grammar feels like progress. Without practice that makes you produce the form, it fades in a week.
Duolingo marks my ending wrong and never tells me why.
Most apps test vocabulary. The endings, where Polish actually gets hard, are left to guesswork.
Paraphrased from learners' comments under popular Polish grammar videos on YouTube.
Reading this table is easy. Saying kotem on the spot is not.
Every Polish noun, adjective and pronoun changes its ending depending on its job in the sentence. Fleksja trains exactly that moment: the sentence is in front of you, and you have to pick the form.
| MianownikNominative | kto? co? | kot |
| DopełniaczGenitive | kogo? czego? | kota |
| CelownikDative | komu? czemu? | kotu |
| BiernikAccusative | kogo? co? | kota |
| NarzędnikInstrumental | z kim? z czym? | kotem |
| MiejscownikLocative | o kim? o czym? | kocie |
| WołaczVocative | o! | kocie |
Three steps, a few minutes a day.
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Learn the word with all its forms
Every flashcard shows the word in each case, plus aspect pairs for verbs. Free, from your first day at A0.
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Use it in a real sentence
A sentence with a gap and four real endings to choose from. The wrong options are the mistakes learners actually make.
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Miss it, see it again
Spaced repetition brings back the exact endings you got wrong, right before you'd forget them.
Flashcards are free. Drills are where it clicks.
Reserve a plan now and keep its launch price. Nothing is charged today.
Build your vocabulary the right way.
- Unlimited flashcards
- Every word with all its case forms
- Verb aspect pairs
- Spaced repetition
Make the endings automatic.
- Everything in Free
- Drills for all 7 cases, singular and plural
- Verb conjugation drills
- A guided path from A0 to B2
Training built around your mistakes.
- Everything in Plus
- Many more exercises
- AI coach that sets up your training around your goals and weak spots
Fleksja is still being built. Reserving means we email you at launch, with your price locked in. No card, no payment.
Before you sign up
Can I download the app today?
Not yet. Fleksja is in development for iOS and Android. Leave your email and you'll be among the first to get it.
Will you charge me if I reserve a plan?
No. We don't ask for a card and we don't take any payment until the app exists. Reserving tells us which plan you want, and we'll hold that price for you at launch.
What level do I need?
Any level from A0 to B2. Beginners start with flashcards and the most common cases. If you already know the theory, you go straight to the drills that cover your weak spots.
How is this different from Duolingo or Anki?
Duolingo teaches phrases and marks your endings wrong without training them. Anki shows whatever cards you make yourself. Fleksja is built around one thing: producing the correct case ending in a sentence, with spaced repetition on the forms you miss.
Does it cover verbs too?
Yes. Flashcards include perfective and imperfective pairs, and Plus adds conjugation drills across tenses.
Get the ending right the first time.
Free flashcards at launch. One email when the app is ready, nothing else.