Knock, knock, knock! vs Biblio Library
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
Biblio Library
Access and enjoy your library's digital audiobooks and e-books in one convenient application. Stream or download titles for offline listening and reading, making literature accessible anywhere.
- Borrow digital books
- Read and listen to literature
- Offline access
- Explore top lists and categories
- Search for favorite titles
- Pause playback for calls
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All digital books in one app! Biblio makes it easy to read and listen to your library's literature wherever you are. Biblio is the library app where you can borrow, read and listen to your favorite literature, both streamed and off-line. Explore among top lists, categories or search your favorites. Off-line If you want to save surf or have a bad cell coverage, you can download the books you want to read or listen to. The books are then stored on your device and you can listen to them on the train or on the flight without interruption. Biblio, the extension of your library. Biblio makes it possible to access your library's book catalog. If you do not find the book that you would like to read or listen to, please contact your library and they will help you find what you are looking for. There may be limits as to how many books you can borrow. If you have questions about how many books you can borrow, please contact your library and they will inform you about which rules they have. Logins are managed by your library. If you have problems logging in, please contact your library. Most libraries are connected to Biblio (Sweden, Finland) some may be a part of a portal and that name will show in the login list. If you do not find the library you are looking for, please contact your library. App rights. Biblio asks for rights to your phone function. The app uses this right to pause playback of a book when you receive a phone call.
Screenshots
Verdict
The clearest difference is price: Biblio Library at Free against Knock, knock, knock!'s $2.99. Biblio Library also leads on update cadence (every 2 months vs every 48 months) and review sentiment (13% vs 0%). Knock, knock, knock!'s advantage is iOS requirement (9.3 vs 12.0). 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
Biblio Library 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, Biblio Library every 2 months. The most recent releases landed on November 1, 2026 and October 6, 2026 respectively.
| Parameter | Knock, knock, knock! | Biblio Library |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 3.0 (10 ratings) — better |
| Positive reviews | 0.0% of reviews | 12.5% of reviews — better |
| Number of ratings | — | 10 — better |
| Update frequency | Every 48 months | Every 2 months — 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 | 12.0 |
| Further details — not scored | ||
| Size | 121 MB | 35 MB |
| Age rating | 4+ | 12+ |
| Developer | Alfabeta | Axiellmedia AB |
Customer experience
Knock, knock, knock!
Biblio Library
In-app purchases
Knock, knock, knock!
No in-app purchases
Biblio Library
No in-app purchases
Questions
Is Knock, knock, knock! free?
Is Biblio Library free?
Do Knock, knock, knock! or Biblio Library have ads?
Which is updated more often, Knock, knock, knock! or Biblio Library?
Other comparisons
