Weblio is a free English dictionary app that provides English-Japanese and Japanese-English translation. It offers over 10 million recorded English words and more than 9 million example sentences for users to search from. The app also includes pronunciation symbols and a voice playback feature to help users understand the pronunciation of English words. Additionally, users can create their own personalized word lists.

The basic dictionary functions of the Weblio app allow users to search for the meaning of English words in Japanese and vice versa. It also provides pronunciation symbols and the ability to play back the pronunciation of English words. This makes it a useful tool for English learners, especially beginners, who are struggling with English language learning and want to improve their everyday conversation skills, grammar understanding, and ability to communicate with native English speakers. It can also be helpful for those who want to assist non-Japanese speakers with directions or customer service.

The Weblio app is not only a useful tool for language learning but also for improving English proficiency. It can be beneficial for students in middle school, high school, and even elementary school, as well as for various language skills such as listening, reading, speaking, and writing. It can also be used for test preparation, such as TOEIC® and English proficiency exams. The app plans to add more features in the future, including functions like displaying the meaning of English words in photos taken with the camera, automatic spelling correction, offline dictionary, English word quizzes, and the ability to smoothly read English newspaper articles.