Doit.im has gone Pro recently with the option to to buy a subscription which at $20/yr isn't too hard on the pocket. There's some increased functionality to go with it which includes email tasks to inbox, drag and drop functionality, Google Calendear integration and a new Review feature which is pretty impressive. You get to do a daily review and integrated weekly review which you can save locally as a report.
I still think the web app could do with a bolder font, but other than that it's one of the few task management apps which provides both a comprehensive desktop and native mobile solution on Android. It looks like Flow which has some nice features like attaching files but cost $99 a year. For that you don't even get a native mobile app whereas Doit.im Pro offers one of the best in class.