MASK‐air®, a validated mHealth app (Medical Device regulationClass IIa) has enabled large observational implementation studies in over 58,000 people with allergic rhinitis and/or asthma. It can help to address unmet patient needs in rhinitis and asthma care. MASK‐air® is a Good Practice of DG Santé on digitally‐enabled, patient‐centred care. Itis also a candidate Good Practice ofOECD (Organisation for EconomicC...