21 Day Vocab Challenge
The ultimate English vocabulary builder plus daily motivation for your success.
Yes, it's free. Upgrade anytime.
The vocabulary challenge
Set your own goal of words per day. Use our vocabulary building tools to learn fast. Get motivated to hit the goal for 21 straight days. Celebrate! Take another challenge. Achieve more.
Words/day
Do it for 21 days
Do it!
Up to 30,000+ English words
We've made this very complete vocabulary word list by collecting the English words most used in real world. The list covers all general topics and is ideal for your English study for any purpose.
Sorted by frequency
We sort the words by their frequency so you always start from the basic to the advanced, maximizing your learning efficiency.
Online flashcards
Our online flashcards allow you to go through the English vocabulary list quickly and focus only on the words you don't know.
Multimedia vocabulary builder
It's easy and fun to learn vocabulary words with rich contents including definitions, examples, translations, pictures, and audios.
Spaced repetition
Learn fast, forget fast? You'll review the new words at the right time point and remember them forever.
Pricing
21 day challenge
30,000 English words
Online flashcards
Multimedia
Spaced repetition
21 day free trial of PRO
Then 5 new words a day
FREE
PRO
$0/year
$99/year
21 day challenge
30,000 English words
Online flashcards
Multimedia
Spaced repetition
Unlimited new words a day
Tips
Aim big, start small.
Sharing the challenge helps you accomplish it.
The best way to learn a word is to use it.
Repetition is the mother of vocabulary learning.
21
days
0
FREE
words
30k
How it works
21 Day Vocab is a Web application. Whenever you want to boost your vocabulary, open this web page using your mobile phone or PC. No download or installation is needed. You even don't have to sign up to try it.
No registration needed