Cough Management Wellness App for Refractory or Unexplained Chronic Cough
The goal of this single-cohort clinical trial is to learn whether a smartphone-based Cough Management (CM) program can reduce cough frequency and burden in adults (21-80 years) who have refractory or unexplained chronic cough. 
The main questions it aims to answer are:
* Does four weeks of using the CM feature in the CoughPro app lower objective cough rate (coughs per hour) compared with each participant's one-week baseline? 
* Does the program also lessen cough intensity (bout metrics) and improve patient-reported quality-of-life scores on the Leicester Cough Questionnaire and PGI-S?
Participants will:
* Wear a Hyfe CoughMonitor smartwatch continuously for 6 weeks (1-week baseline, 4-week intervention, 1-week follow-up), charging it nightly. 
* Complete science-based in-app CM lessons based on behavioral cough-suppression therapy and practice the techniques during the 4-week intervention.
* Fill out online questionnaires (LCQ and PGI-S) at baseline and at the end of Week 4.
* Join a brief exit interview, then return the smartwatch and receive a compensation voucher.
Gender: All
Ages: 21 Years - Any
Refractory Chronic Cough
Unexplained Chronic Cough
Cough Hypersensitivity