Inclusion Criteria:

• Patient experiencing at least moderate pain (on the Categorical Pain Scale) for more than 3 months
• Patient with a BPI interference score ≥ 3 in at least 3 out of 7 dimensions
• Patient with a smartphone and an internet connection at the place of use
• Patient affiliated with a social security system or benefiting from such a system

Exclusion Criteria:

• Patient opposing participation in the study
• Patient with severe anxiety and/or depressive disorders (especially a suicidal risk)
• Patient presenting one or more barriers to the initiation of cognitive-behavioral therapy (significant social difficulties, low adherence to current care, insufficient memory or cognitive abilities, lack of time, lack of motivation...),
• Adult patient under legal protection measures (guardianship, legal safeguard, psychiatric care, or deprived of liberty by judicial or administrative decision)