The short answer

Polish is a pronunciation and consonant problem before it is a case problem. The nasal vowels, the two sibilant series, and the barred ł that is really a "w" all survive a transcript intact, so a text-based app hands the tutor the word you meant and never hears the one you said. Here your audio goes to the model directly. Stress, at least, is a gift: it sits on the second-to-last syllable of almost every word. If you have a trip booked, Travel Mode rehearses you, sets one real task a day in the city you are in, and debriefs you afterwards.

Polish has a reputation as one of the hardest languages in Europe, and it earns about half of it. The grammar is genuinely large: seven cases, gendered nouns, aspect on every verb. But the writing system, the thing that scares people at first sight, is almost perfectly regular once you learn that its clusters of letters are mostly single sounds.

The letters that are not what they look like

Start with ł. It is not an l. It is the “w” in water, and reading it as an l is the fastest way to sound wrong: miłość is “miwość”, mały is “mawy”.

Then the digraphs. Sz, cz, rz, ch and dz are each one sound, not two, which is why a word like chrząszcz, which looks like a keyboard accident, is a single syllable. Polish really does string consonants together, but it never wedges a helping vowel between them, and that inserted vowel is the English habit to drop.

And the sibilants come in two sets, a hard one and a soft one, and the difference between them is the difference between prosię, a piglet, and proszę, please. English has a single “sh” and wants to merge the two.

None of this is visible to a transcriber.

Why the tutor hearing you is the point

Your audio goes to the model directly and it replies in audio, so the tutor is responding to how you actually sound rather than to a cleaned-up text of it. In a language where the errors are a flattened nasal vowel or an l where a ł belongs, that is the whole game. A transcript receives the word you were aiming at and never learns that you missed it.

There is one genuine mercy: stress. It falls on the second-to-last syllable of nearly every word, and it stays there. After the consonants, a rule that simply holds feels like a reprieve.

What a session is

Unscripted conversation, in real time, with something you can interrupt. Behind it sits an authored CEFR syllabus of 333 items from A1.1 to C1, of which 116 are capabilities: concrete things you can do rather than grammar points. What you keep getting wrong shapes later sessions with nothing to configure.

The tutors carry the country’s range, from the brisk standard of Warsaw to the softer, more melodic Polish of Kraków and the open coastal cadence of Gdańsk, so your ear is not tuned to a single voice.

Going to Poland

Travel Mode changes the app for the length of a trip. Rehearsal before you go, then one real-world mission a day while you are there, drawn from your own syllabus and set in the city you are in: order something and pay for it, ask where something is. You do it, then you come back and tell your tutor how it went. The cases can wait for the debrief; the coffee cannot.

The five Polish tutors

Every language has five, each from a different place and each sounding like it. You can switch whenever you like, and the app remembers where you are regardless of who you talk to.

KacperWarsaw
Clear, neutral standard Polish, the Mazovian norm heard on national media, evenly paced and easy to follow.
ZofiaKraków
Cultivated Lesser-Poland Polish with a slightly softer, more melodic lilt and unhurried enunciation.
MarekGdańsk
Clear northern Polish with the calm, open cadence of the Baltic coast.
OlaPoznań
Tidy, precise Greater-Poland Polish with a crisp, slightly clipped delivery.
PiotrWrocław
Bright, lively Lower-Silesian Polish with an open, upbeat rhythm.

What English speakers usually find hard

These are drawn from the pronunciation patterns the tutor listens for in Polish. Because it hears your voice rather than a transcript of it, they are things it can actually notice and work on with you.

The barred ł is an English "w": Two letters that look alike and sound nothing alike. Plain l is an English "l"; the barred ł is the "w" in water. Reading ł as an l is one of the first things that marks a learner, turning miłość into "milość" instead of "miwość". It is the quickest fix on this list.
The nasal vowels ą and ę: Two vowels English has no equivalent for. Ą is a nasalised o, ę a nasalised e, and both shift by position: a word-final ę usually relaxes to a plain e, so proszę comes out "prosze", and before b or p the pair turn into "om" and "em". Flattening them to plain vowels is audible at once.
Two sibilant series, hard and soft: Polish keeps a hard set (sz, cz, ż, the "sh, ch, zh" made with the tongue pulled back) apart from a soft set (ś, ć, ź, made with the tongue flat against the palate). The difference carries meaning: prosię, a piglet, against proszę, please. English has a single "sh" and wants to merge them.
The digraphs are single sounds, which shortens the clusters: A word like chrząszcz looks unpronounceable until you know that sz, cz, rz, ch and dz are each one sound, not two. Once they collapse, chrząszcz is a single syllable. Polish does run real consonants together, but never with a helping vowel wedged in, and that inserted vowel is the English instinct to unlearn.
Stress sits on the second-to-last syllable: Almost the whole language stresses the penultimate syllable, and it stays there as endings are added, so the stressed syllable shifts with the word (student becomes studenci). After the consonants, a rule that simply holds feels like a gift.