Knock Knock: Who’s There?

Izzet Ubeydullah Arpaci Education iPhoneiPadiPod touch

Knock Knock: Who’s There? is a paid Education app for iPhone and iPad by Izzet Ubeydullah Arpaci. Requires iOS 15.0. Updated January 30, 2026.

Price: 0.99 USD; on the App Store
Size: 11 MB; Age 4+
Updated: Jan 30; 2026 · v2.0

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About Knock Knock: Who’s There?

Knock Knock is a simple and fun educational game designed for children aged 1–5. Children learn basic English words through playful sounds and interactions in a completely safe environment. • Designed for toddlers and preschoolers • Teaches basic English words • No ads, no in-app purchases • No data collection Perfect for parents who want a safe and engaging learning experience for their children.

What’s new

Version 2.0 · Updated January 30, 2026

What’s New Expanded content: now 250+ surprise items Refreshed visual design New background music Minor fixes and performance improvements

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App privacy

The developer, Izzet Ubeydullah Arpaci, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

App details

Knock Knock: Who’s There? is a paid Education app for iPhone, iPad and iPod touch, developed by Izzet Ubeydullah Arpaci. It requires iOS 15.0 or later and is 11 MB to download. It was first released on January 16, 2026 and last updated on January 30, 2026.

Category: Education
Price: 0.99 USD
Version: 2.0
Size: 11 MB
Requires: iOS 15.0 or later
Compatibility: iPhone, iPad, iPod touch
Languages: English
Age rating: 4+
Released: January 16, 2026
Last updated: January 30, 2026
Developer: Izzet Ubeydullah Arpaci

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Alternatives to Knock Knock: Who’s There?

Looking for apps like Knock Knock: Who’s There?? Here are 6 similar apps on the App Store. The highest rated is LevelUp Reader (4.7/5), and all 6 are free to download.

Knock Knock: Who’s There? vs. alternatives
App	Rating	Price	Last updated	Compare
Knock Knock: Who’s There?	–	0.99 USD	January 30, 2026
Word Flip: Vocabulary Builder	–	Free	Sep 2, 2026	Compare
Ekid+	3.8 / 5 (4)	Free	Oct 24, 2026	Compare
Inventioneers	4.3 / 5 (321)	Free	Sep 23, 2025	Compare
LevelUp Reader	4.7 / 5 (24)	Free	Jan 16, 2026	Compare
English Reading and Listening	4.6 / 5 (391)	Free	Sep 10, 2026	Compare
Yuppo: Baby Tracker・Milestones	4.7 / 5 (147)	Free	Oct 25, 2026	Compare

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