Table 1.

Tools in Twazon addressing evidence-informed weight loss practices.

Practice	App Information
Weight assessment and goal setting	Assesses weight by calculating body mass index and waist circumference
	Allows users to set their ideal weight, and sets a target date for achieving the weight loss goal
	Calculates the number of calories needed daily based on their target weight
	Recommends a decrease of at least 600 calories consumed per day in order to achieve weight loss goal
Healthy diet	Recommends daily servings/portions of all foods and beverages, including 6 cups of water per day
	Recommendations given according to healthy lifestyle self-assessment score
	Provides a customized healthy food palm based on the user’s intake report
	Recommends the reading of labels and describes how to properly read labels
	Offers some suggestions for healthy food options in place of unhealthy food items.
	Allows users to correct a poor meal/diet as an education tool for menu planning
	Tips will be sent if the intake/activity ratio is off-balance according to healthy lifestyle self-assessment score
Physical activity	Recommends a minimum of 30 minutes of physical activity three times a week and allows users to assess their physical activity every 2 weeks
	Tips will be sent if the amount of physical activity is low
	Recommends taking at least 10,000 steps and provides a pedometer that tracks the daily number of steps
Self-monitoring	Allows users to track their daily food (calories) and water intake, and number of servings per food group, every 2 weeks
	Allows users to self-assess their physical activity, every 2 weeks
	Provides a weight loss tracker that informs user of current weight loss toward their goal weight (kg)
Social support	Provides an app-specific message board allowing users to privately share experiences, weight loss goals achieved, and photos with other users
	Allows users access to social networking services such as Twitter