Danish21 vs Ether Echo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Danish21
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Master Danish in 21 days with Danish21! Learn Danish through a structured 21-day course designed for real-world conversations. Practice with Speech recognition, track your progress, get advice from a teacher, and learn while driving your car. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ether Echo
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You will not learn to write Japanese here. You will learn to understand it when someone says it, and to say it yourself. That is a decision, not a gap. Learning to read and draw a foreign script costs months that bring you no closer to a conversation. Ether Echo removes that step and spends every available minute on the only two things that produce speech: your ear and your mouth. THE METHOD Every word you meet becomes a card, and every card comes back at the moment you were about to forget it. That is spaced repetition, computed by FSRS, the algorithm that models your forgetting curve instead of following a fixed schedule. You review less and retain more, because nothing comes back too early. But the cards are not word lists. Every word arrives inside a sentence you hear, spoken by a voice, in context. You do not memorise "dog = 犬". You hear a sentence about a dog, and you understand it. WHAT A SESSION LOOKS LIKE - Hear a sentence, choose what it means. - Hear it with no text at all, once the word is anchored enough to drop the crutch. - Read a sentence in your own language, find how it is said in the other. - Say it out loud, and speech recognition tells you whether you were understood. None of it asks you to draw a character. THE VOICE TUTOR Once you have enough words, you talk to a tutor that answers out loud, live, in the language you are learning. It stays inside what you already know: it will not use words you have never met. This is where vocabulary turns into speech. SCRIPTS THAT ARE NOT LATIN Japanese appears in rōmaji, Mandarin in pinyin with its tones, Russian in accented transliteration, because Russian stress is never written down and changes what a word means. You always read something you can pronounce. LANGUAGES English, French, Spanish, German, Japanese, Mandarin, Russian. The interface speaks all seven, and you pick the one things are explained in. PLACEMENT A short assessment finds where you already are. You do not start at "hello" if you are past it. SUBSCRIPTION The app, the courses, the spaced repetition and every exercise are included. The subscription pays for live conversation minutes with the voice tutor: 50, 150, 300 or 600 per month depending on the tier, billed monthly or yearly. Thirty trial minutes when you sign up, no card required. TERMS OF USE Auto-renewable subscription, monthly or yearly. It renews unless you cancel at least 24 hours before the current period ends, and it is managed from your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://echo.infiniteether.studio/confidentialite/en
Screenshots
Verdict
The clearest difference is ads: Danish21 at none against Ether Echo's shown. Danish21 also leads on update cadence (every 4 days vs every 10 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Danish21 sells 1 one-off in-app purchase and Ether Echo sells 8 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Danish21 ships an update every 4 days, Ether Echo every 10 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.
| Parameter | Danish21 | Ether Echo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 10 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 546 MB | 84 MB |
| Age rating | 4+ | 12+ |
| Developer | OLE PETTER HAUGEN | Infinite Ether Interactive Inc. |
In-app purchases
Danish21
- Danish21 Pro$19.99
Ether Echo
- Lite$9.991 Month
- Starter$24.991 Month
- Regular$39.991 Month
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- Intensive$79.991 Month
- Lite Annual$99.991 Year
- Starter Annual$249.991 Year
- Regular Annual$399.991 Year
- Intensive Annual$699.991 Year









