This is a very nice app and it has been working good for months now but from the past 5 days it isn't opening. I thought maybe it was a bug and the would fix it soon but it's been 5 days and nothing yet. It shows internet error occurred even though my internet is perfectly fine. I tried installing the app again but in vain. Please look through the matters. Other than that webtoon is a great app and you should definitely install it.