Viz Media (app, pay per vol. or $2.99/MONTH subscription)
Shounen Jump (app, limited free or pay per vol. or $1.99/MONTH subscription)
Manga Plus (app, LEGALLY FREEEEE)
ComicWalker (browser view, LEGALLY FREEEEE)
Mangamo (app, paid subscription)
Comixology (app & browser view, paid subscription or pay per volume, if you already have an Amazon account than your in luck when you subscribe)
Romance Comics (app & browser view, rent paid or subscription or pay per vol.)
Manga Planet (app & browser view, paid subscription)
Manga Reborn (browser view, pay per chapter)
J-Novel Club (app, subscription or pay per vol.)
Crunchy roll (app & browser view, manga included in certain paid subscriptions)
Coolmic (smartphone browser view, pay per chapter)
There’s a couple more as well.....
You know, if there was a site or app or something with all manga's on (like mangago), and if they would ask for a monthly subscription. I WOULD TOTALLY GO FOR THAT. Like Netflix but than for Manga. The author gets payed and we get to keep a site like this.