An honest comparison
Zonlo vs Duolingo
These two apps are built for different moments. Duolingo builds a daily habit; Zonlo gets you through the moment your mind goes blank mid-sentence.
What Duolingo is genuinely great at
Duolingo made daily language practice a habit for hundreds of millions of people, and that is a real achievement. Its streaks, XP, and playful characters keep you coming back day after day, and it covers a breadth of languages almost nothing else matches. If you want a fun daily habit that touches reading, listening, and vocabulary across dozens of languages, Duolingo is hard to beat.
Where Zonlo is different
Duolingo is built around engagement mechanics: streaks to protect, XP to earn, leaderboards to climb. That works brilliantly for building a habit. It does less for the specific problem Zonlo exists for: knowing the words in your head and freezing when it is time to say them to a real person.
Zonlo is a private rehearsal space. You pick a realistic scenario (ordering coffee, checking into a hotel), say your reply out loud, and get wins-first feedback: what worked, then one small tweak. Then the other person replies and the conversation continues, exchange after exchange, until it is done. There are no streaks, no XP, no chatbot persona, and never a red error mark. Your audio never leaves your phone; only your words, as text, are checked.
Plenty of people could sensibly use both: Duolingo for the daily habit, Zonlo to rehearse a specific conversation before it happens for real.
Side by side
| Zonlo | Duolingo | |
|---|---|---|
| AI chatbot persona | No chatbot, no persona. You rehearse authored, realistic conversations. | Yes, AI conversation features with its characters. |
| Streaks and XP | None. No daily pressure of any kind. | Yes, central to the experience. |
| Red error marks | Never. Wins come first; tweaks are quiet grey. | Yes, mistakes are marked in red. |
| On-device audio (voice never uploaded) | Yes. Speech recognition runs on your phone; only text is sent. | We haven't verified this |
| Register and politeness feedback for Japanese | Yes, every reply is checked for register, backed by a morphological analyzer. | We haven't verified this |
| Rehearse-before-real-life focus | Yes. The whole app is built around rehearsing real moments. | No, built around broad daily practice. |
Where we can't speak for Duolingo, we say so instead of guessing. Features and pricing change; check their site for what's current.
We hold ourselves to the same honesty: our grader's numbers, and what we haven't validated yet, are published on the accuracy page. Weighing a different app? Read Zonlo vs Speak.
Common questions
Is Zonlo a Duolingo alternative for speaking practice?
For speaking out loud specifically, yes. Zonlo does one thing: you rehearse realistic conversations out loud and get gentle, register-aware feedback on what you said. Duolingo covers far more ground (reading, listening, vocabulary, many languages), so many people use both for different jobs.
Which app is better if speaking makes me anxious?
Zonlo was built specifically for people who freeze when speaking. There are no streaks, no timers, and never a red error mark; feedback opens with what you got right, and nobody is listening except your phone. Duolingo is built around daily engagement mechanics, which some anxious learners find motivating and others find pressuring.
Does Zonlo have streaks, XP, or gamification?
No. Zonlo has no streaks, XP, leaderboards, or daily pressure. The only goal is finishing a conversation you would actually have in real life.
Does Zonlo send my voice to a server?
No. Speech recognition runs on your phone, so your audio never leaves it. Only your words, as text, are sent to be checked.
Rehearse it here first.
Zonlo is coming soon to the App Store. Join the waitlist and be first in when it lands.