Software Treatment for Actively Reducing Severity of ADHD in Adolescents (STARS-ADHD-Adolescents)

Inclusion Criteria: 1. Adolescents between the ages of 13 and 17 years and 10 months at time of consent (must be under 18 years at study completion) 2. Confirmed diagnosis of ADHD combined or inattentive type, according to Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) as confirmed by MINI-Kid Version 7.0.2. 3. Stably on or off ADHD medication for ≥4 weeks prior to study enrollment and throughout the 4-week study 4. Baseline visit score on the TOVA-ACS score ≤ -1.8 5. Access to and self-report of ability to connect wireless devices to a functional wireless network 6. Ability to follow written and verbal instructions (English) as assessed by the PI and/or study coordinator 7. Able to comply with all testing and study requirements 8. Estimated IQ score ≥80 as assessed by the Kaufmann Brief Intelligence Test, Second Edition (KBIT-II) 9. Patient assent and caregiver informed consent 10. Stably on or off psychoactive medications for ≥4 weeks prior to study enrollment and throughout the 4-week study Exclusion Criteria: 1. Current controlled or uncontrolled, comorbid psychiatric diagnosis that in the opinion of the Investigator may confound study data/assessments. 2. Participant is currently considered at risk for attempting suicide, has made a suicide attempt within the past year, or is currently demonstrating active suicidal ideation or self-injurious behavior, in the opinion of the Investigator based on the MINI-kid clinical interview. 3. Motor condition (e.g., physical deformity of the hands/arms) that prevents game playing as reported by the participant or observed by the Investigator. 4. Recent history (6 months prior to screening) of substance use disorder 5. History of seizures (excluding febrile seizures), significant tics, or a current diagnosis of Tourette's Disorder. 6. Known sensitivity to playing video games, such as photo-sensitive epilepsy, light-headedness, dizziness, nausea or motion sickness. 7. Participation in a clinical trial within 3 months prior to screening. 8. Plans to initiate, or to make significant changes in frequency, of non-pharmacological behavioral therapy during the study 9. Color blindness as detected by Ishihara Color Blindness Test 10. Urine test positive for nicotine or marijuana 11. Any other medical condition that in the opinion of the Investigator may confound study data/assessments. 12. Previous exposure to Akili Products within the 6 months prior to study enrollment 13. Plans to initiate or make significant changes to frequency or duration of non-pharmacological trainings with the aim to improve cognition by means of game or app-based cognitive trainings or neurofeedback, during the study