Knock, knock, knock! vs Polylino
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Knock, knock, knock!
This interactive book app brings a classic children's story to life with engaging page-turning and the ability to record your own narration. It's designed for young children to enjoy a beloved tale in a new digital format.
- Interactive page turning
- Recordable narration
- Multiple language options
- Classic children's story
- Designed for toddlers
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The book Knock, knock, knock! is one of the best selling children's books in Sweden. In this app we've adapted a classic book for small children. – Choose language by pressing the icon in the upper left corner. - Turn page by tapping on the doors (three times for big doors, one time for small doors) or by swiping to the next page. – You can also record your own reading of the book!Press the microphone in the upper left corner and follow the instructions. Suitable for children from 1 year. Illustrations and text: Anna-Clara Tidholm Publisher: Alfabeta Bokförlag AB Produced by: Nekomata Games/5Monkeys
Polylino
A multilingual digital picture book app designed for educators to use in early childhood classrooms. It offers a library of age-appropriate books with read-aloud or listen options in various languages, supporting emergent literacy and curriculum goals.
- Multilingual digital picture book library
- Supports emergent literacy
- Culturally diverse books
- Picture books and non-fiction
- Accessible for all students
- Curriculum support
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Bring the magic of storytime to every child with Polylino! Polylino is a multilingual digital picture book app for educators and teachers to use in the classroom for early childhood education. The digital library of books on the app supports the curriculum, and develops a child’s emergent literacy. The books available can be read aloud or listened to in different languages. This is how Polylino supports your teaching: · Gives your students access to hundreds of age-appropriate books · Offers multilingual narrations so all children can be included · Strengthens a love of reading at a young age · Supports emergent literacy · Develops a child’s ability to read · Offers culturally diverse books · Supports the Learning Foundations and curriculum · Encourages personal, social, and emotional development · Has picture books, factual books, non-fiction, and more! · Inclusive and accessible to students Read along with Polylino and include all your students during storytime. Listen to many of our books in multiple languages, so all your students can be included, no matter their home language. For questions about our service, please email: support@ilteducation.com
Screenshots
Verdict
The clearest difference is price: Polylino at Free against Knock, knock, knock!'s $2.99. Polylino also leads on review sentiment (33% vs 0%) and update cadence (every 3 weeks vs every 48 months). Knock, knock, knock!'s advantage is iOS requirement (9.3 vs 15.6). On 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
Polylino is free to download; Knock, knock, knock! costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Knock, knock, knock! ships an update every 48 months, Polylino every 3 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | Knock, knock, knock! | Polylino |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 4.2 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | — | 5 — better |
| Update frequency | Every 48 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 15.6 |
| Further details — not scored | ||
| Size | 121 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Alfabeta | ILT Inläsningstjänst AB |
Customer experience
Knock, knock, knock!
Polylino
In-app purchases
Knock, knock, knock!
No in-app purchases
Polylino
No in-app purchases
Questions
Is Knock, knock, knock! free?
Is Polylino free?
Do Knock, knock, knock! or Polylino have ads?
Which is updated more often, Knock, knock, knock! or Polylino?
Other comparisons
