1Streak will help you to form a new habit. You just create a new challenge, set the title and how many days your challenge will last. 1Streak will count number of days left until you reach your goal, so you dont need to do it yourself. Believe me, it gets hard when you are trying to track multiple habits at the same time on your own.
And if you failed somewhere along the line, you can always start over. Never give up!