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By Jackbox Games, Inc.

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YOU DON’T KNOW JACK is now totally FREE to play!

Download the SPIKE TV Video Game Awards' “Social Game of the Year” to your iPhone, iPad or iPod Touch.

This free-to-play mobile version includes hundreds of full episodes of everybody’s favorite quiz show trivia game, with new, topical episodes added every week! And with our new upgrade, ALL episodes are completely free to play – no tokens needed! All told, more than 300 regular, themed, and special guest episodes are available right now.

“It doesn't feel like a game made for a tablet. It feels like tablets were made for this game.” -

We've brought back many of your favorite question types, the DisOrDat, the Gibberish Question and the Jack Attack, along with new specialty questions such as Funky Trash, Cookie’s Fortune Cookie Fortunes with Cookie “Fortune Cookie” Masterson, and "Elephant Mustard, Teddy Roosevelt, or Dracula?!"

To succeed at YOU DON’T KNOW JACK, you've got to be smart and you've got to be quick. Are you up for the challenge?

Free-to-play mobile highlights:

- Play against friends, enemies, or random strangers!

- Unlock fake sponsors and commercials!

- Earn special achievements and more!

- It’s FREE!

If you are unable to log into the game with Facebook please try the following:
1. Open the settings menu on your device
2. Scroll down until you see 'Facebook'
3. Open the Facebook tab and scroll down until you see YDKJ
4. Make sure the switch is flipped to ON

If you experience other problems running the game please upgrade to the latest iOS version for your device.

What's New in Version 1.2.1

Bug Fixes


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Customer Reviews

Needs more questions & more funny adult language

I had this game on cd rom for the computer and ive always loved it!! I still love the game and love the new feature that you can play online with friends but you should add more questions and more funny adult language (for example-you used to come up with funny names for us players is we didnt put our names in fast enough:)- i think you guys should combine the new game and the old attributes that had me talking about YDJ for years! I was a little disappointed in the new version of the game , if you combine the old and new i would play all day every day!!:). (:!!*also you should be able to play offline with the computer as a one player, not everyone has constant access to the internet and would like to play also!!*:)

Fun, but not as good as the original

I started playing YDKJ when it first came out on the Mac and won interface design awards several times. I bought all the extension packs, which made it a requested game at parties.

Roll forward about 20 years. It's now on phones and tablets, and it's fun, but the number of questions per round have dropped, and it can't be played by several people at a table.

If you enjoy witty, snarky, humor, and think quickly and are good with trivia, this is a good game to try.


The game is great! I have been playing since the 90s. However, there is a problem with your server. I have Kindle fire and it works great. I bought an iPad and most of the time when I try to play I get a server error message. All of my other devices work great. I have really good high speed internet service it seems like your server has problems with my iPad.

View In iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Games
  • Updated: Nov 27, 2013
  • Version: 1.2.1
  • Size: 47.4 MB
  • Language: English
  • Seller: Jackbox Games, Inc.
Rated 12+ for the following:
  • Infrequent/Mild Profanity or Crude Humor
  • Infrequent/Mild Alcohol, Tobacco, or Drug Use or References
  • Infrequent/Mild Mature/Suggestive Themes

Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Small Token Pack$1.99
  2. Deluxe Upgrade$2.99
  3. Small Token Pack (50% off)$0.99
  4. Large Token Pack$8.99
  5. Medium Token Pack$4.99
  6. Huge Token Pack$16.99
  7. Large Token Pack 3 Times Tokens$8.99
  8. Mega Token Pack$49.99

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