Controlled Investigation to Evaluate Impact of dCBT on Psychological Symptom Burden in Adult Subjects With PF

Inclusion Criteria: 1. Age ≥22 years at the time of signing the informed consent 2. Self-reported Pulmonary Fibrosis diagnosis 3. A GAD-7 score of ≥5 at pre-screening and baseline 4. If currently on prescribed medication for depression/anxiety, a stable dose for at least 4 weeks prior to baseline 5. CT scan report within 5 years prior to baseline with signs of PF (interstitial changes) 6. Capable of using a mobile device and common applications, and has an appropriate mobile or tablet device Exclusion Criteria: 1. Self-reported manic disorders, psychotic disorders, schizophrenia, or alcohol/drug abuse during the past 6 months prior to baseline (Visit 1), as judged by the investigator or designee. 2. Self-reported history of hospital admissions due to suicidal behavior or attempts, as judged by the investigator or designee 3. Self-reported previous or current diagnosis of major depressive disorder, as judged by the investigator or designee 4. Verbal and/or written communication problems limiting ability to engage with dCBT-IPF 5. Inability to comply with investigation procedures, due to e.g. cognitive impairment or severe medical conditions as judged by the investigator or designee 6. Currently receiving cognitive behavioral therapy