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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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iPad Screenshot 1
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Customer Reviews

Lost my score total!

Enjoy playing the game for over a year, I login this morning and my score is back to zero! I have lost everything as well as when I paid for premium! I hope this can be resolved. If not just play for enjoyment but not to get to the magical 100,000,000 score and level 31. I made it to 64,000,000 and it seems my life's work is ruined! Guess I need to go get a job or something! Btw, you get to level 30 at 8,750,000, for those wondering.

Update: They fixed the bug mentioned above a couple of days later and I was able to continue, now I just made 100,000,000 points to get to level 31, but there is no level 31. It just tells you, you made it to level 30 and says you won 200 points but no points are awarded and no level 31. Every game over 100,000,000 it goes through the same sequence, says you made it to level 30 and so on. Fun game, guess it is over now.

Quick hint: If a game gets stuck just start your camera feature and then go back to the game and it will resume.

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!!*:)

Bring it on!

Used to love this game on the computer! Haven't seen it for years, thanks for bringing it back.

Update: when I press the Play For Free button now, it won't let me play unless I sign up for a Publishers Clearinghouse sweepstakes. I have no interest in this. When I hit the button that says skip and continue with game, it goes back to the start screen where I have to press the Play For Free button again and the Publishers Clearinghouse sign up pops up again. Annoying. This is after I had to delete and redownload the game because it kept crashing.

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