Personalized Approach To Habits - Sleep

This study is testing a personalized smartphone-based program to help teenagers with asthma improve their sleep habits, since poor sleep can worsen asthma symptoms. **You may be eligible if:** - You are between 14 and 17 years old - You have been diagnosed with asthma by a healthcare provider - You speak and understand English - You have access to a computer and the internet - You have a smartphone and can download and use an app - You live in the United States **You may NOT be eligible if:** - There are no exclusion criteria listed for this study — most teens with asthma who meet the above criteria may qualify Talk to your doctor to see if this trial is right for you.