Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Stack - A word association brain game by MochiBits, Inc., get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Stack - A word association brain game

By MochiBits, Inc.

Open iTunes to buy and download apps.


Challenge your brain and have some fun with Stack, a word association brain game. Be careful, it's addicting!

If you love crossword, word search, or hangman, you will love this twist on word association.

5/5 "Awesome game. keeps the brain thinking. Love it."

5/5 "Great game! Challenging enough without being difficult. Nice to play a game without a time limit for once. Fun and relaxed."

Laugh... Giggle.
Smile... Frown.
Key... Board.
King... Queen.

Stack and match words that are associated to each other!

Words can be synonyms.
Words can be antonyms.
Words can be compound.
Words just have to be related!

Warning! Caveat! As stacks get harder, a word can be matched to multiple different words, so you'll have to get the right combination to complete the stack correctly.

Stack comes with 40 free word stacks, and you also have the option to buy more stack packs or buying ALL the present and future stack packs for one low price.

Buying any Stack Pack or ALL Packs IAP will remove the ads.

Enjoy! Thanks!

-Kyle and Howard

What's New in Version 2.0.0

Thank you everyone for playing Stack! We really appreciate it.

We've totally updated the look and have added iPhone 5, 5s, 5 and 6+ support.

ALSO!!! We added 2 new packs!!!

If you enjoy Stack, please let us know you would like more content. :)


-Kyle and Howard


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5
iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Customer Reviews

Great Fun

What an incredibly enjoyable and challenging game. I usually buzz right through NY Times crossword puzzles, but these puzzles give me a fun run for my money. Sometimes you have to put your brain in neutral, use your intuition, and just let the answers kind of come to you. Get it and have a great time, while not feeling like a dunderhead.

Unique and original!!

Very unique original game that really stretches my brain. I like that the word associations are normal and intuitive. Some of the levels are easy and some area pretty hard. Overall a fantastic game! I recommend this game to any wordie or anyone who likes a challenge!

Very fun

I liked it quite a bit. I occasionally did not see the connection between words as enough. But fun.

Stack - A word association brain game
View In iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Games
  • Updated: Jan 29, 2015
  • Version: 2.0.0
  • Size: 6.2 MB
  • Language: English
  • Seller: MochiBits, Inc.

Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. All Stack Packs$3.99
  2. Common Stack Pack$0.99
  3. Ordinary Stack Pack$0.99
  4. Familiar Stack Pack$0.99
  5. Regular Stack Pack$0.99
  6. Usual Stack Pack$0.99
  7. Average Stack Pack$0.99
  8. Typical Stack Pack$0.99
  9. Standard Stack Pack$0.99