Background:This study aimed to assess the degree to which an individual's daily activities were affected during the treatment with myofunctional and functional appliances by using a validated tool called the Oral Impact on Daily Performance scale. Materials and methods:The study population consisted of 51 children aged 7- to 13years undergoing functional and myofunctional therapy. The patients' total and subscale scores were compared based on age, gender, nature and type of appliances using Independent sample t-test, Chi-square and ANOVA. Results:All patients reported impacts on eating and speaking, smiling, and social contact irrespective of the type of appliance delivered. The performance with the maximum impact score on daily performance was smiling (49.1%) and emotional stability (49%). The impact of very severe intensity was reported for speaking (29.4%), social contact (21.6%) and eating (17.6%). A significantly higher overall impact was reported with fixed appliances in comparison to removable appliances, with performances like cleaning (p=0.001), sleeping (p=0.03), and school work (p=0.045) being significantly affected. A significant difference was seen in overall impact based on the type of appliance (p=0.03), with the highest mean impact for Modified Reverse Twin Block. Conclusion:During the early stages of treatment, the functional and myofunctional appliance considerably impacts daily performance and may reflect on patient compliance and acceptance of treatment.