SmartBook vs Kazling
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SmartBook
This app facilitates language learning through bilingual reading. It offers parallel text, tap-to-translate functionality, and audio narration to help users master new languages by reading books and articles. Users can upload their own content or access a library of free dual-language books.
- Parallel book reader
- Tap to translate
- Real-time translation with Reverso Context
- Audio narration
- FB2 and EPUB reader
- Vocabulary builder
- AI translation
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SmartBook turns any book into bilingual reading. Tap any word for instant translation, study side by side in parallel text, and learn languages naturally — through stories you actually want to read. Choose from a free library of over 75,000 books — or import your own. Read Spanish books, Italian books and French books with parallel translation. Open German books, Portuguese books, Russian books and English books in the same bilingual library — all dual language, all in one app for polyglots and language learners alike. LEARN BY READING: Spanish reading, Italian reading and French reading become simple when every word is one tap away. Whether you want to learn Spanish by reading, learn Italian by reading or learn French through real stories, books in Spanish with translation, books in Italian with translation and books in French with translation make the path natural. German reading, Portuguese reading and Russian reading are all here too. Prefer fiction? Open bilingual stories and dual language novels — Spanish stories, French novels, Italian short stories, Russian stories — with AI explanations one tap away while you read. KEY FEATURES: • Bilingual reading — Two languages side by side in a compact parallel text view. Choose your translation service and your pace. • Tap to translate — Read ebooks in their original language and access translations and word definitions with a single tap; long-tap or double-tap any section to translate exactly what you need, or translate a whole chapter at once. • Real-time translation in context — Reverso Context shows example sentences for the word you tapped. Save unfamiliar words to your vocabulary builder and grow your vocabulary effortlessly. • Word and phrase pronunciation — Tap any word or phrase to hear how it is pronounced — or switch on automatic pronunciation — and improve listening and speaking. • Open every format — fb2, epub (with images) and txt; any ebook opens in seconds, ready to read and translate. Import your own fonts and read the way you like. • Many translation engines — Google Translate, DeepL, Microsoft, Yandex, Reverso Context and even ChatGPT, all in one bilingual reader. • Wide language support — English, Spanish, German, French, Italian, Portuguese, Russian, Chinese, Korean, Japanese and more, in the original or with translation into your native language. • Free bilingual library — Over 75,000 free e-books, novels, short stories and articles in parallel text, with new titles every week. Spanish books, Italian books, French books, German books, Portuguese books and Russian books, side by side with translation. Create folders, filter, sort and search to find your next read. • Vocabulary builder — Save words and phrases with their context, learn them with spaced repetition, export to Anki or ReWord. • AI translation — ChatGPT, Claude and Gemini explain meaning, grammar and synonyms while you read. • Dual Language Read of Dual language books — a true bilingual book reader and dual language reader for every page. • Bilingual library with over 75,000 free books for foreign language reading. Long-tap or double-tap any section of text and translate it with the service that suits you. No more switching between apps or dictionaries — SmartBook is your one-stop solution for translation while reading. Elevate your language learning with parallel translation — the ultimate companion for polyglots, readers and learners. Explore, study and grow at your own pace, all within the pages of your favourite books. Install SmartBook today and unlock a deep world of linguistic adventure. Parallel text reader is your ultimate foreign language reading app.
Kazling
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Kazling — это удобный и минималистичный мобильный справочник академических и танымдық (познавательных) материалов. В приложении собрана уникальная база текстов по различным категориям: • Жалпы мәдениет (Общая культура) • Ғылым салалары (Научные дисциплины: психология, логика, генетика, медицина и др.) • Мақал-мәтелдер (Казахские пословицы и поговорки) • Қосымша материалдар (Дополнительные полезные тексты) Особенности: Работает полностью автономно (офлайн) без интернета. Удобный поиск по всей базе знаний. Чистый интерфейс и комфортное чтение без отвлекающих элементов. Никакой регистрации и сбора личных данных. Скачивайте Kazling и расширяйте свой кругозор в любое время и в любом месте!
Screenshots
Verdict
The clearest difference is in-app purchases: Kazling at none against SmartBook's 3. On price, ads, 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. SmartBook sells 3 in-app purchases, starting at $1.99 per month. Kazling asks for nothing beyond the download.
| Parameter | SmartBook | Kazling |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (23 ratings) — better | — |
| Positive reviews | 56.8% of reviews | — |
| Number of ratings | 23 — better | — |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 104 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Stanislau Kurs | Murat Sadykov |
In-app purchases
SmartBook
- Monthly Subscription$1.991 Month
- Annual subscription$19.991 Year
- Premium PRO$24.99
Kazling
No in-app purchases









