ReadNihon vs rikaikun

ReadNihon is a browser extension and mobile app that allows readers to easily look up the meaning of Japanese words while reading Japanese webpages or ebooks. It acts like a pop-up dictionary, providing quick definitions without interrupting the reading experience.

Rikaikun is a browser extension for Chrome and Firefox that provides pop-up dictionary definitions for Japanese words when you hover over them on web pages. It's useful for learning vocabulary while browsing Japanese websites.