Cough Management Wellness App for Refractory or Unexplained Chronic Cough

Inclusion Criteria:

* Age 21 or older.
* Currently suffering from a cough that started at least 8 weeks ago that is largely unproductive (i.e., at least 50% of the time the cough produces zero mucus that needs to be spit out or swallowed).
* Normal chest X-ray or chest CT scan at some point that was prescribed specifically for their cough.
* At least one physician visit for cough with standard-of-care therapy but inadequate symptom relief.
* Stability of treatment: willing to avoid new cough treatments during study or report changes if they occur.
* Ability to comply: willing/able to wear the watch daily for the required duration of study and to complete all required questionnaires.
* Informed consent: understanding of the study procedures and agreement to comply with protocol.

Exclusion Criteria:

* Recent upper respiratory infection (past 4 weeks).
* History of hemoptysis (coughing up blood) since onset of the current cough.
* Current smoker (incl. vaping) of any substance.
* ≥10 consecutive pack-years smoking history within \<10 years prior to screening.
* Diagnosed with a chronic lung condition (COPD, emphysema, lung cancer, IPF, chronic bronchitis, asthma). Note: Suspected asthma without confirmed diagnosis or benefit from asthma therapy is not an exclusion.
* Current or past head/neck cancer.
* Difficulty swallowing.
* On ACE inhibitors, such as Benzapril (Lotensin), Captopril (Capoten), Enalapril/Enalaprilat (Vasotec oral and injectable), Fosinopril (Monopril), Lisinopril (Zestril and Prinivil), Moexipril (Univasc), Perindopril (Aceon), Quinapril (Accupril), Ramipril (Altace), and Trandolapril (Mavik)
* Prior treatment for cough by a speech-language pathologist.
* Living with another individual with a frequent cough that would interfere with monitoring.
* Participation in any cough intervention study within 30 days or 5 half-lives of the intervention.
* Major scheduled surgery during the study period.