I have found my anime list to be helpful in that it will often tell you the status of the manga in it's country along with additional information like any prequels, sequels, side stories, anime adaptations and also if known the entire number of chapters in a given work
I have found my anime list to be helpful in that it will often tell you the status of the manga in it's country along with additional information like any prequels, sequels, side stories, anime adaptations and also if known the entire number of chapters in a given work