This white paper describes the details of usability assessment of NEEK Language Acquisition app by BehPAS Cognitive Technologies. A total of 24 users were recruited (12 female, 12 male; equally sampled in age groups 30-40, 40-50, and 50<). Usability was assessed with wearable eye tracking, questionnaires and face-to-face interviews. Quantitative and qualitative methods were used to interpret the data and key insights are provided that indicate a number of key strategic directions for NEEK’s development.