Welcome to the world of acrostics! An acrostic, also called a crostic or double crostic, is a cousin of crossword puzzles, with clues and answers whose letters are rearranged to form a quote from a famous (or not-so-famous) author. If you're familiar with acrostics, you will quickly see how convenient they are on the iPhone, because letters are automatically copied to the correct place as you type them in.

Crostix, the online library of acrostic puzzles, is now available for the iPhone, iPad and iPod Touch. It includes 150 puzzles, from easy to fiendishly hard, and you can buy more puzzles right in the application. For free sample puzzles, download the aptly-named Crostix Free.

The program has all the features you'd expect:

- get hints for a single letter or an entire word,
- see your score, based on how many hints you needed,
- change the font size by pinching,
- rotate the device as you like, and
- get help on all program options.

If you're new to the world of acrostics, the application also includes a short description to get you started. More tutorials about acrostics are available on our Web site!

What’s New

Version 3.3

Three new books! Crostix Books 12 and 13, and a second book of Larry Katzman's Gaglines puzzles. Updated for iOS 10. Unfortunately, that also means you will need at least iOS 8 to run this new version. Our apologies to those using older devices.

But most importantly, we hope that this new version fixes the evil and long-standing bug which caused the app to be stuck in "Waiting for Data" mode for new books. Let us know if you still have problems with this; fixing it is our number one priority.

Ratings and Reviews

4.7 out of 5
22 Ratings

22 Ratings

NSC41 ,

Absolutely wonderful.

I have spent many hours enjoying these puzzles and learning many things I did not know before. I hope that will continue to be additions to the Crostix library as I have completed most of them that are currently available.

deserves no stars at all ,

Great app but no updates for several years!

I love this app, but there have been no new puzzles for several years. It's easy to use and most of the puzzles are information and fun to solve.

I like the more complicated puzzles, not the gag lines. However, the Sherlock Holmes puzzles are extremely difficult. I exhausted the Mumford puzzles quite a while ago, which makes the current version of the app worthless.

PLEASE add more puzzles soon!

Avalon440044 ,

Great Game!

I love word puzzles and this is one that works very well - great interface; nice gradations on clues; super variety of topics and quotes.

App Privacy

The developer, Mountford Line, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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