MostUsedWords vs Mondly
Bite-sized lessons with chatbot conversation practice vs. frequency-ranked, spaced-repetition vocabulary.
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| MostUsedWords | Mondly | |
|---|---|---|
| Method | Frequency-ranked vocabulary + spaced repetition | Bite-sized lessons with chatbot conversation practice |
| Starting price | 29.95/month, all 9 languages included | $9.99/mo, $47.99/yr, or $99.99 lifetime (all 41 languages) |
MostUsedWords and Mondly both help Czech learners, but they solve different problems. MostUsedWords is a flashcard app built around word frequency: the 10,000 most common Czech words, ranked by real corpus data, reviewed on a spaced-repetition schedule. Mondly is a chatbot-style course built around bite-sized daily lessons, with a cheap lifetime tier covering all 41 of its languages. Want a vocabulary you can measure and drill? MostUsedWords fits. Want quick, low-cost conversation practice? That's Mondly's whole design.

How Much Do They Differ?
| Criteria | MostUsedWords | Mondly |
|---|---|---|
| Price | $29.95/month, $199.95/year, or $599.95 lifetime (9 languages included) | $9.99/mo, $47.99/yr, or $99.99 lifetime (all 41 languages) |
| Method | Frequency-ranked flashcards with spaced repetition | Bite-sized lessons with chatbot conversation practice |
| Spaced Repetition | Yes | No |
| Frequency-Ranked Vocabulary | Yes (10,000 most common words per language) | No (fixed topic order) |
| Audio & IPA Phonetics | Yes (audio and IPA on every word) | Audio only, no written IPA |
| Best For | Vocabulary retention and self-paced learning | Quick daily practice across many languages |
Where Mondly Excels in Quick, Affordable Practice

Mondly's case is straightforward: short, chatbot-driven lessons that fit into a busy schedule, backed by a lifetime tier that's cheaper than most single-language subscriptions and covers all 41 of its languages, Czech included. That's a genuinely convenient setup for someone who wants to dabble across several languages without committing to one. What it doesn't do is vocabulary the way a flashcard app does. There's no spaced repetition, so nothing decides when a word should resurface. There's no frequency ranking, so lessons follow a fixed topic order rather than how often you'd actually hear a word. And there's no written IPA to check pronunciation against outside the audio itself.
Where MostUsedWords Excels in Vocabulary Depth
MostUsedWords works the other way. Every Czech word is ranked by how often it actually shows up in real usage, and spaced repetition decides when each card comes back based on how well you know it, not a fixed topic order. Every word also ships with audio, IPA phonetics, and an example sentence, so pronunciation has both a sound to hear and a written reference to check against, not audio alone. That's built for measurable vocabulary retention, not quick conversational dabbling.
Want to see the frequency-ranked Czech flashcards in action?
Which Should You Choose?
There's no wrong choice here, just a different job for each tool. Pick MostUsedWords if you want a Czech vocabulary you can measure: words ranked by real-world frequency, reviewed on a schedule built to stick, with IPA phonetics for every word. Pick Mondly if you want cheap, bite-sized practice across many languages without a spaced-repetition system underneath. Nothing stops you from running both: MostUsedWords for the words, Mondly for quick daily conversation reps.
Does MostUsedWords include Czech in its multi-language plan?
Yes, Czech is one of the 9 languages included in every MostUsedWords plan, with frequency-ranked vocabulary and spaced repetition built for it specifically.
Does Mondly use spaced repetition for Czech vocabulary?
No, Mondly has no spaced-repetition system. Its bite-sized lessons follow a fixed topic order rather than resurfacing words based on how well you know them.
Is Mondly's lifetime plan a good deal for Czech learners?
Mondly's lifetime plan is cheaper than MostUsedWords' and covers all 41 of its languages, which suits learners dabbling across several languages. It doesn't include frequency-ranked vocabulary or spaced repetition, which MostUsedWords is built around.
Why Frequency-Ranked Vocabulary Works
Learning the most common Czech words first gets you understanding real speech and text faster than any other order.
Ranked by Real Frequency
Our deck is ranked by real corpus frequency, not a curated topic list or fixed lesson order — you always study the word that will show up next in real use.
Vocabulary, Not a Full Course
This is the vocabulary track — frequency-ranked words, IPA phonetics, and bilingual example sentences. Pair it with a grammar resource or class for a complete course.
One Deck, Every Level
Your subscription includes the full 10,000-word deck, A1 through C2, across all 9 languages — no separate purchase as you progress.
Every Card Includes
Five data points per word — not just a translation.
Frequency Rank
Know exactly how common each word is in real speech and writing.
IPA Phonetics
Every entry includes the International Phonetic Alphabet pronunciation. Hear it right the first time, every time.
Bilingual Example Sentences
Each word appears in a native-language sentence with an English translation — real context, not invented examples.
Grammar Information
Part-of-speech tags, noun gender, verb conjugation classes — the grammatical context you need to actually use each word.
Spaced Repetition
Proven SRS algorithm schedules each card at its optimal interval for long-term retention.
All Devices
Study on web, iOS, Android, Windows, or Mac. Progress syncs automatically across every device.
Want a physical reference for Czech? Browse our frequency dictionaries — printed vocabulary books with the same frequency-ranked data, IPA, and bilingual examples.
Start Your Vocabulary Today
Every plan includes the full 10,000-word deck — A1 through C2 — across all 9 languages. No hidden fees. Cancel anytime.
- All 9 languages, one subscription
- 10,000 frequency-ranked words per language
- IPA phonetics + example sentences
- Spaced repetition system
- Web app — iOS & Android coming soon
- New languages as they launch
- All 9 languages, one subscription
- 10,000 frequency-ranked words per language
- IPA phonetics + example sentences
- Spaced repetition system
- Web app — iOS & Android coming soon
- New languages as they launch
- All 9 languages, one subscription
- 10,000 frequency-ranked words per language
- IPA phonetics + example sentences
- Spaced repetition system
- Web app — iOS & Android coming soon
- All future languages included