Clinical Research Directory

Inclusion Criteria: * Age 18 years and older. * Having a clinical diagnosis of cancer including patients on active treatment or cancer survivors. * Self-reporting moderate to severe CRF for at least one week (worst level of fatigue ≥ 4 on a 10-point numerical rating scale, retained in international guidelines as an optimal cutoff for identifying clinically significant CRF). * Being able to read and understand French. * Having access to a smartphone. * Patients must be affiliated to a social security system or beneficiary of the same. Exclusion Criteria: * Suffering from current psychiatric disorder or cognitive disorder that would interfere with the ability to consent or participate. * Currently engaging in cognitive-behavioral therapy. * Currently engaging in another non-drug (behavioral) clinical trial. * Suffering from physical related reversible and treatable causes of fatigue (anemia, electrolytes unbalance, infections, renal dysfunction, active metastases causing fatigue, hormonal unbalances (hypothyroidism, adrenal insufficiency, etc.) - according to physician's judgement at the moment of inclusion.