# LevelUp Reader vs Knock Knock

The clearest difference is price: LevelUp Reader at Free against Knock Knock's $0.99. Knock Knock's advantage is update cadence (fortnightly vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

LevelUp Reader is free to download; Knock Knock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LevelUp Reader ships an update monthly, Knock Knock fortnightly. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | LevelUp Reader | Knock Knock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (24 ratings)](https://appshunter.io/ios/app/levelup-reader/id1670140344/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 112 MB | 11 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rosen Publishing Group, Inc.](https://appshunter.io/developer/427614059) | [Izzet Ubeydullah Arpaci](https://appshunter.io/developer/1866510718) |

## What reviewers say

### LevelUp Reader

[App page](https://appshunter.io/ios/app/levelup-reader/id1670140344)

This adaptive reading platform builds foundational literacy skills for young learners with a digital library of over 2,400 books. It offers interactive phonics activities, personalized bookshelves, and progress tracking for students in PreK-3.

**Highlights:** Adaptive digital library with 2,400+ books, Interactive phonics activities and decodable books, Personalized bookshelves based on interest and level, Offline reading capabilities, Progress monitoring and reporting, ELA standards correlation

**Features:** macOS Compatibility

**In-app purchases:** none


### Knock Knock

[App page](https://appshunter.io/ios/app/knock-knock-whos-there/id6757381793)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LevelUp Reader free?

LevelUp Reader is free to download, with no in-app purchases.

### Is Knock Knock free?

Knock Knock costs $0.99, with no in-app purchases.

### Do LevelUp Reader or Knock Knock have ads?

Neither LevelUp Reader nor Knock Knock shows ads.

### Which is updated more often, LevelUp Reader or Knock Knock?

LevelUp Reader ships an update monthly, and Knock Knock fortnightly. Most recently, LevelUp Reader was updated on October 14, 2026 and Knock Knock on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*