If you have trouble remembering what you've learned, then this is the app for you.

Featured by Apple! Knowji makes the highest quality and most effective vocabulary apps in the App Store. You won't believe how quickly you'll learn! This SAT Top 500 app teaches you 500 of the most commonly occurring words in the SAT® exam.

“I am an English teacher. I now have 3 of your apps for myself, and I encourage all my students to buy this app as they're studying for the SAT. Knowji, you're a life-saver.” Ms. Barber, The Harker School, English Teacher, San Jose, CA

“My son is using Knowji SAT Top 500. We bought him an SAT vocab book and also one more app, but he likes this one. He completed this app (500 words) in 10 days. He was not at all showing any interest in the other app and the hard book. I really recommend this app to SAT students.” Ranishoba

“I highly recommend this app to all students taking the SAT exam. In just 2 weeks prior to the exam, my daughter’s verbal SAT Critical Reading score improved by 70 points just by learning 100 out of 500 words that were in the app.” Mary W., Pleasanton, CA

“The Knowji SAT Top 500 app is excellent for my students. I love it.” Toby Lee, Education Director, Nationwide Masters Tutoring Company, New York

Our built-in MEMORY COACH uses scientifically proven methods to ensure that you'll learn and remember hundreds of words quickly and easily. Our team of content creators, including Stanford University graduates and Ph.Ds, spent years developing rich, engaging content so that you won't just memorize words, you'll really understand them!

Knowji offers the richest set of content and the most effective technology to help you learn and remember. When evaluating other apps and learning systems, ask yourself if they offer you what Knowji offers you:

- Image: A beautiful custom image for every word.
- Audio pronunciation
- Example sentence(s): Sentences written in a story-like format with endearing characters that help you develop an emotional connection with the words you're learning.
- Collocations: Use words you’ve learned with collocation information.
- Synonyms
- Antonyms
- Word family
- Verb tenses
- Adjective comparatives & superlatives
- Nouns singular & plural forms
- Many roots and affixes

- Spaced Repetition: A scientifically proven method for optimal memory retention. The app keeps track of how well you've learned a word, and presents challenging words more frequently than others. It even suggests a time when you should drill again before you forget the words.
- 4 Learning Modes: Passive & active recall (including spelling), receptive & productive learning.
- Quiz: Quiz yourself anytime using multiple modes.
- Goal Setting: Specify how many new words you want to learn per day, or set a target completion date.
- Search: Look up words by the word itself, definition, or example sentence.
- Favorite a word so you can quickly reference the word later.
- Do Not Learn: No more wasted time learning words you already know.
- Progress Tracker: See how many words you've learned and how well you know them.
- Status Report: Track your learning progress.
- Accent Reduction & Proper Pronunciation: Record your own voice and compare it with Knowji’s voice.

Q: How does SAT Top 500 differ from other Knowji vocab apps?
A: SAT Top 500 is designed for students who are studying only weeks before the exam. It contains 500 most frequently occurring words in the SAT. If you have more time and want to boost your score even more, we recommend Knowji Vocab 7-10 (1600 SAT words), which includes all words in the SAT Top 500.

*** Download our FREE Knowji Vocab Lite app and sample content from all our apps! ***

CONNECT WITH US: (for fun word quizzes) (We love hearing from you.)

What's New

Version 2.6.0

Minor content refresh and update to latest iOS.

Ratings and Reviews

5 out of 5

6 Ratings

6 Ratings

Knowji is the best


I love using Knowji - user friendly.
Learning vocabulary words is very easy now! The app also talks to you so you will also learn how to pronounce each word correctly!

Quiz mode is very useful.
I recommend this app!!

Highly Recommended


I had a hard time remember the words in the past. With this app, I have no problem at all in learning these words. Love it!

I love it!


This app has helped me tremendously. It makes it easy to understand and remember the definitions.


Knowji, Inc.
27 MB
Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 Knowji, Inc.


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