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Ninjawords Dictionary

By Matchstick Software

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"The best electronic dictionary I've ever used." -

Ninjawords is the simple, fast and deadly dictionary for the iPhone.

Ninjas are three things:
1. They're smart
2. They're quick
3. They're deadly accurate

Ninjawords was built on these principles. We made it because we saw that the low-cost dictionaries on the App Store are slow, cluttered, and all use the same bad data source for their definitions.

Ninjawords takes a different approach. We use awesome, fresh, high quality data with more words and synonyms than you can throw a ninja star at. And best of all, when you look up your words, they all stay on the page. No need to flip back and forth between different pages as you look up multiple words.

* Works OFFLINE.
* Spellcheck!
* Word of the day each time you start the app.
* Touch to get a random vocabulary word.
* Recents.
* Favorites.
* Thesaurus (each definition has synonyms).
* Pronunciations (tap to play)
* Fast like a ninja.

See our website,, for an in-depth video of Ninjawords in action; you'll love it!

"Exactly what I've always wanted in an iPhone dictionary, and, yes, with both a better user experience and better dictionary content than the other low-cost dictionaries in the App Store."
John Gruber,

"I've been using the dictionary since the day it was released, and have since deleted all other dictionaries from my iPhone. It’s good. It’s really good."
Milind Alvares,

"A simple, lightweight, well-designed dictionary application."
Dan Moren, Macworld

"It leaves the competition in the dust. It is a ninja-based dictionary, after all."
Brian Heater, AppScout

What's New in Version 1.7

iOS 6.0 support.

iPhone Screenshot

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Customer Reviews

Great but...

I like this app a lot and use it quite often. It would be nice for iPhone 5 support, but it still functions great aside from one error: when scrolling through the list of previous words, on occasion the scrolling will stall when the thumb presses down on the definition. It's almost like the definition on some words is a button. Quite a weird bug.


Works brilliantly on the ipad. Not sure why people are complaining about trivial things like how the icons look - the app is supposed to quickly tell you what words mean, and it does that exceptionally well. It got even better, once I finally figured out how to make the little ninja appear...!


This is so bare. No pronunciation helps and despite being touted as having audio pronunciation, I didn't see a speaker icon next to anything I looked up. If I knew how to get my money back, I would. It is only "retina-quality" if you don't enlarge the screen, and you must use the app on your iPad only in portrait mode which makes the keyboard significantly smaller. I am now suspicious of all the glowing reviews where no one mentioned these drawbacks to using this app on an iPad.

Ninjawords Dictionary
View In iTunes
  • $1.99
  • Category: Reference
  • Updated: Oct 11, 2012
  • Version: 1.7
  • Size: 10.0 MB
  • Language: English
  • Seller: Matchstick Software
You must be at least 17 years old to download this app.
  • Frequent/Intense Mature/Suggestive Themes
  • Frequent/Intense Profanity or Crude Humor

Compatibility: Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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