Author	Study Design	Setting	Participants	Type of Technology	Intervention	Outcome Measure
Kurki et al. (2018)	Cohort study	Outpatient clinics & university hospitals, adolescent psychiatry services, Finland	N = 70 young people (13–17 years) N = 9 nurses	Online platform / website	Support platform (wellbeing, coping skills and self-reflection)	Exploration
Rowe et al., (2020)	Cohort study	Primary mental health services, Australia	N = 120 young people	Online platform / website	n/a	Feasibility / usability
Gabrielli et al. (2020)	Pilot feasibility evaluation	Secondary school	N = 20 young people (co-design workshop) N = 21 young people (evaluation)	Online platform / website	Co-design workshop	Feasibility
Snijder et al., (2021)	Cross-sectional cohort study	Schools × 4, Australia	Aboriginal and Torres Strait Islander young people aged 12–14 years	Online platform / website	n/a	Design/acceptability/usability
Marsch and Borodovsky (2016)	Review	Primary care, schools, homes, medical settings, and universities	Young people	Online platform / website	Substance misuse prevention (CLIMATE, Head On, Thinking Not Drinking, RealTeen)	Efficacy
Crum and Comer (2016)	Review	Unspecified	Families accessing mental health care	Online platform / website	Various family-orientated psychological interventions	Feasibility
Schueller et al. (2017)	Review	Unspecified	Young people	Online platform / website	n/a	Usability / engagement
Town et al. (2017)	Cross-sectional qualitative interviews	London CAMHS team with a low utilisation of the platform	N = 6 practitioners with low utilisation of the platform	Online platform / website	n/a	Acceptability/ feasibility
Wozney et al., (2017)	Review	Unspecified	Young people accessing psychotherapy	Online platform / website	Internet-based psychotherapy (IPT & CBT)	Efficacy
Babiano-Espinosa et al., (2019)	Systematic review	Unspecified	Young people aged 4–18 with OCD	Online platform / website	Traditional CBT with Internet-based CBT	Acceptability/feasibility/ efficacy
Radovic et al. (2020)	Case series	Primary care	n = 14 primary care providers/physicians	Online platform / website	Pre-intervention focus group	Implementation strategy development
Wall et al. (2018)	Review	Unspecified	n/a	App / game	Use of technology for research with children	Exploration
Day et al. (2019)	Review	Australian schools	Children aged 6–12. n = 3460 children have contributed to the data	App / game	Assessment administered via an interactive game played on computer or iPads	Acceptability/ feasibility
Boström et al. (2016)	Cross-sectional feasibility and validity study	18 schools in Sweden	n = 113 students in special education aged 12–16 and their parents and teachers	App / game	WellSEQ—wellbeing in special education questionnaire, an app for tablets	Feasibility/ acceptability/ validity
O'Grady et al. (2020)	Cohort study	Secondary school in Ireland	Practitioners from mental health services and secondary school students	App / game	SafePlan app: Suicide prevention and wellness	Usability
Wolters et al., (2017)	Review	Unspecified—mental health services	Young people experiencing OCD	App / game	Technology empowered CBT (tCBT) for paediatric OCD	Exploration
Davidson et al., (2019)	Cross sectional pilot evaluation	Four different Community MH settings	n = 13 providers and n = 27 families	App / game	Novel tablet-based App designed to enhance trauma-focused CBT (TF-CBT)	Acceptability
Carrasco (2016)	Cohort cross-sectional study	Two different schools, Chile	n = 5 therapists and n = 15 young women with depression aged 14–18	App / game	Videogame following structures of CBT and IPT for depression. Private forum that includes information and self-care	Acceptability
Merry et al., (2020)	Cross sectional cohort study	New Zealand, Child and young person mental health	Practitioners, young people	Other PC software	HABITS (Health Advances through Behavioural Interventional Technologies): e-health interventions, referral support and screening, participant pool for clinical trials	Feasibility/acceptability
Chou et al. (2016)	Review	Unspecified	n/a	Video-related technology	Video-teleconferencing	Recommendations
Eapen et al., (2021)	Case study	Psychiatry services, Australia	N = 5 child and adolescent psychiatry trainees	Video-related technology	Assessing clinician attitudes and thoughts after the introduction of e-mental health into a psychiatry service	Feasibility/ exploration
Sequeira et al., (2019)	Review	Child and adolescent psychiatry	Children and young people	Other technology	Digital phenotyping as an assessment for adolescent depression	Exploration/ feasibility/ efficacy
Liverpool et al., (2020)	Systematic review	Unspecified	Children and young people participating within digital mental health interventions	Mixed	n/a	Exploration
Batastini (2016)	Review	Juvenile offending services	Juvenile offenders	Mixed	Various	Efficacy
Hollis et al. (2017)	Systematic and meta-review	Unspecified—mental health services	Young people accessing mental health services (including ADHD, ASD, psychosis, eating disorders, and PTSD)	Mixed	Various	Efficacy
Owens and Charles (2016)	Feasibility long-term cohort study	CAMHS England	1 clinician/client dyad	SMS	SMS text messaging for young people that self-harm	Feasibility
Gearing et al. (2021)	Randomised control trial	USA, young people accessing psychotherapy for depression	n = 20 young people with depression, with a mean age of 14 years	SMS/phone calls	Tech Connect -contacting individuals between sessions using SMS personalised messaging (8 weekly messages), and 3 telephone calls to parents	Feasibility / acceptability