Habit Domino is the simplest habit-forming/habit-tracking app that could possibly work.
Just add your daily/weekly routines, swipe them when you do the activity and simply get to GREEN. Commit to visiting the app once a day and all your habits should fall into place; like dominoes.
If you need GRAPHS or REMINDERS, this app is NOT FOR YOU. If you've tried not to break the chain, beating your longest streak, leveled up and gamified your routines and none of them have worked for you, try doing the simplest possible things by using this app and see if it works for you.