Inclusion Criteria:  Informed Consent as documented by signature Men and women, aged 18 and over at date of signing the Informed Consent Form Patients diagnosed with a chronic cough of unknown origin or COPD or Asthma or with interstitial lung disease. Attending the treatment procedure as an outpatient Using a smartphone (minimal version: iOS 13 / Android 10) on a daily basis and willing to install SIVA-P3 smartphone application Adequate communication in German or Swiss-German (all study documentation and SIVA-P3 will be set to German language only).  Exclusion Criteria:  Unable to make the decision to participate in a clinical study (e.g. seriously ill or unconscious subject, or subject with a mental or intellectual disability) Inability to follow the procedures of the study, e.g. due to physical or intellectual impairment precluding informed consent or protocol adherence, psychological disorders (excluding depression) or dementia Use of any other medical device equipment (e.g. portable oxygen concentrator, artificial cardiac pacemaker, implantable cardioverter-defibrillator) Pregnancy: Female participants in child-bearing age without a negative pregnancy test (urine test). Female participants who are neither surgically sterilized / hysterectomized nor post-menopausal for longer than 2 years are considered as being of childbearing potential.Known or suspected non-compliance, drug or alcohol abuse Participation in another clinical study