KasKalba vs Fern
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KasKalba
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Disclaimer: KasKalba is an independent educational app. It is not affiliated with, endorsed by, or authorised by any government body of the Republic of Lithuania. Information about the official language exam and the Constitution basics exam is based on these official sources: • Official language exam information — National Agency for Education (NŠA): https://www.nsa.smsm.lt/for-foreigners/lietuviu-kalbos-egzaminai-uzsienieciams/ • Official text of the Constitution — Seimas of the Republic of Lithuania: https://www.lrs.lt/home/Konstitucija/Konstitucija.htm Dates, fees and registration conditions change. Always check the sources above before acting. — Learn Lithuanian from the very beginning, at your own pace. KasKalba takes you from the alphabet to B2 along an ordered path: each stage holds levels, each level holds short lessons that end in practice. No prior knowledge and no bridge language required. ■Built for people who actually move there Lithuanian has seven cases and free word order, and almost nothing in it is guessable from English. Explanations here say so plainly, warn you where the grammar has no English equivalent, and never assume you have studied linguistics. ■Audio Over 3,500 recordings of words, sentences and dialogues. The lesson audio is bundled in the app; scenario and exam audio downloads on first use and is then kept on your device. Tap any word to hear it. ■What is inside • Twenty ordered levels from A1 to B2 • Real-life dialogues: doctor, municipality, work, shopping • Vocabulary banks with images and pronunciation • A short daily challenge to keep a streak going • An official exam at the end of every stage ■Exam preparation State-format simulations of the official language proficiency exam for the A1/A2 and B1 categories, covering reading, listening and writing. A separate module prepares you for the Constitution basics exam. ■Offline The lessons and their audio are bundled in the app and work with no connection. The interactive scenarios and the listening clips in the stage exams are downloaded the first time you open them, then kept on the device. A connection is also needed to sync your progress. ■Subscription Stage A1 is free. A subscription opens the remaining stages; exam simulation and the Constitution module are sold separately. All subscriptions are managed from your store account. Terms of Use (EULA): https://kaskalba.com/terms.html
Fern
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Fern is a beautiful flashcard app for learning languages. Words come from where you actually meet them: the book you are reading, a video with subtitles, a photo of a page. Everything runs on your device, with no account, no cloud and no ads. SMART REVIEW An FSRS scheduler brings a word back exactly when memory starts letting go of it. The "At risk of forgetting" section gathers what is about to slip, and "Best time to study" points to the hour when your sessions work best. The algorithm tunes itself from your own review history. 12 STUDY MODES Learn, Flashcards, Test, Match, Write, Dictation, Build a phrase, Audio, Context, Hard words, Speed review, Cram. The Learn mode walks each word up the ladder of mastery on its own, from recognition to free recall. FROM BOOKS An EPUB, FB2, TXT and SRT reader with tap-to-translate. Chapters, bookmarks, reading themes, read-aloud, paged and scrolling layouts, bilingual view with a paragraph translation. Smart analysis shows how much of a text you already know and which words to learn first. FROM VIDEO Paste a link to a video with subtitles and the lines turn into cards with translation and real-voice audio, while the video itself reads in karaoke mode. FROM PHOTOS Snap a page and Fern recognises the text, then offers the unfamiliar words as cards. Recognition works offline for Latin script. QUICK CAPTURE A word from the clipboard, an article by URL, a quick "word — translation" list. A card takes a couple of taps, translation included. GRAMMAR ON THE CARD Verb conjugation and noun forms for Spanish, French, German, Italian, Portuguese and Russian, right on the back of the card. MOTIVATION Daily goals with a progress ring, a study streak with freeze shields for the day you miss, achievements and weekly stats: vocabulary composition, parts of speech, activity heatmap, review forecast. LOOK AND FEEL Deep green theme, light and dark schemes, switching by time of day. Large tiles and live animation throughout. LANGUAGES Interface in English, Russian, German, French, Spanish, Italian and Portuguese. Over 55 study languages, plus your own custom ones. Ready-made starter decks, deck import from Anki (.apkg), CSV and TSV, vocabulary export. PRIVACY Decks, words and stats stay on the device. No analytics, no cloud backup. A backup is an ordinary file you keep yourself, and restoring it can either replace everything or merge only what is new. FERN PRO Cards, every study mode, the scheduler, stats, reminders, backups and vocabulary export are free, with no limit on decks or words. Fern Pro unlocks your own material: books, videos, articles, text recognition from photos and imported decks. The first source is free, so you can try it on your own book before paying. The subscription runs monthly or yearly and is cancelled in the app with one tap; anyone who bought Fern Pro earlier keeps it for good. The Fern Pro subscription renews on its own until you cancel it in Apple ID settings. The App Store shows the price and the period on this page. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://thet1me-1.github.io/Fern/privacy.html Fern is free software under GPL-3.0.
Screenshots
Verdict
The clearest difference is update cadence: Fern at every 5 days against KasKalba's every 3 weeks. On price, ads, in-app purchases and device support 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. KasKalba sells 5 in-app purchases, starting at $17.99 per month and Fern sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
KasKalba ships an update every 3 weeks, Fern every 5 days. Both last shipped on October 31, 2026.
| Parameter | KasKalba | Fern |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.5 — better |
| Further details — not scored | ||
| Size | 79 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | Mohammad Yousef Khalil Rabaa | Alexandr Matrosov |
In-app purchases
KasKalba
- Premium - Monthly$17.991 Month
- Premium - Yearly$129.991 Year
- Constitution - 1 Month$3.99
- Exam Practice - 1 Week$8.99
- Exam Practice - 1 Month$24.99
Fern
- Fern Pro$9.99









