App review by
Dana Anderson, Common Sense Media
Knock-Knock! App Poster Image
Ads mar free version of simple, mostly harmless joke app.

Parents say

No reviews yetAdd your rating

Kids say

age 7+
Based on 1 review

Did this review miss something on diversity?

Research shows a connection between kids' healthy self-esteem and positive, diverse representations in books, TV shows, and movies. Want to help us help them? Suggest a diversity update

A lot or a little?

The parents' guide to what's in this app.

Ease of Play

This app cuts right to the chase with knock-knock name and punch line
only, so there's no clutter of the standard lead-in lines ("Knock-knock,
Who's there?" and "____ who?"). It's easy to use: One touch of the "Tap Me!" icon makes a new joke appear. This simplicity means there is no way to search for specific jokes, save jokes, or sort by categories.

Violence & Scariness
Sexy Stuff

Nothing graphic, but joke punch lines include "Wait, her dress is unbuttoned," as well references to underwear and pants falling off.


Words like "stupid" and "darn" appear in some jokes.


Ads constantly rotate at the bottom of screen while users read jokes. A paid version of the app is also available; the paid version has no ads.

Drinking, Drugs & Smoking

What parents need to know

Parents need to know that Knock-Knock! supplies kids with a stream of knock-knock jokes, all at the tap of a finger. The "dirtiest" jokes you'll find here go something like: "Knock, knock," "Who's There?" "Champ." "Champ Who?" "Champ poo your hair. It's dirty." Small ads appear at the bottom of the screen in the free version. No ads in the paid version also available in the App Store.

User Reviews

  • Parents say
  • Kids say

There aren't any reviews yet. Be the first to review this title.

Kid, 8 years old January 19, 2015

I love jokes

I love jokes, like Yo Mama Jokes.

Is it any good?

KNOCK-KNOCK! is a simple, fun app for kids who are going through that "knock-knock" phase to learn some mostly harmless new jokes. Knock-knock jokes help kids understand puns, so you might even call this app a tiny bit educational, although it is meant to entertain -- and includes some creative spellings (or misspellings). The ads at the bottom of the screen -- for apps mainly geared toward adults -- seem unfortunately mismatched to a young audience. No ads on $.99 version.

App details

  • Devices: iPhone, iPod Touch, iPad
  • Price: Free
  • Pricing structure: Free
  • Release date: January 4, 2010
  • Category: Entertainment
  • Publisher: Ronald Bell
  • Version: 1.0
  • Minimum software requirements: iOS 3.0 or later
  • Last updated: August 25, 2016

Our editors recommend

For kids who love to laugh and play with words

Common Sense Media's unbiased ratings are created by expert reviewers and aren't influenced by the product's creators or by any of our funders, affiliates, or partners.

See how we rate

About these links

Common Sense Media, a nonprofit organization, earns a small affiliate fee from Amazon or iTunes when you use our links to make a purchase. Thank you for your support.

Read more

Our ratings are based on child development best practices. We display the minimum age for which content is developmentally appropriate. The star rating reflects overall quality and learning potential.

Learn how we rate