Eye tracking enables musical expression for individuals with motor disabilities, yet gaze-based music apps remain scarce and challenging. This study qualitatively evaluates five gaze-controlled musical programs through questionnaires and dialog transcription with seven participants: five music professionals, one person with cerebral palsy expert in multimedia education, and one inclusive communication specialist. The analysis focuses on three eye tracking obstacles: inaccuracy, the Midas Touch problem, and eye fatigue. Results show that under these testing conditions, larger, spaced-out buttons reduce accidental touches, while customizable structures offer advantages; however current programs require assistance rather than enabling autonomous use. Scroll-based interaction proved difficult and accident-prone and is not recommended. Midas Touch and inaccuracy were the most frequent obstacles, while eye fatigue may contribute to interaction overload. Music professionals expressed a need for programs oriented towards musical production, but none of the evaluated applications fully addressed this demand.

Digital media can facilitate collaborative processes among local agents, value endogenous resources, and promote assets associated with territory. This article presents the results of a study concerning the development and validation of a mobile app for promoting the relationship among agents of the Portuguese Centro region’s communities/entities. This paper focuses on the results of a heuristic evaluation of the mobile app carried out with two groups of experts in Digital Technologies, Tourism, Health, and Well-Being, besides providing an overview of the mobile app that was developed and a theoretical background regarding community-led innovation, usability, and heuristics. For the CeNTER app prototype evaluation itself, the use of Nielsen's heuristics, a MATCH-MED scale, together with a Think-Aloud Protocol allowed us to improve its usability. This article contributes to a reflection about the evaluation of mobile apps in the scope of territorial-based innovation initiatives, engaging its stakeholders in the process.