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Fitbod - Personalized Strength-Training powered by Machine Learning
100 days of SEO - An actionable SEO tip to your inbox each day
MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.
100 in 100 Challenge - Get 100 new paid users in 100 days
Strong.app - Strenght training logger.
Steps - A steps app that promotes some competition