Click Developer Website below to watch a 4 minutes tutorial. Or type in following address: https://youtu.be/NU7QJwinYbw Features: 1. Conveniently recording new words with only two clicks while reading 2. Support all popular reading apps, including Kindle, iBooks, Safari, Bluefire, Scribd, Flipboard, etc.. 3. Studying the words by groups: new, review, and learned 4. Learning language of your choice (20+ languages supported) 5. Syncing the words across iPhones, iPads and Macs over iCloud 6. Collecting awards for learning new words 7. Optional a-word-a-day notification to make your learning persist