Table 1.

Overview of the studies identified in the literature search.

Study	Year	Mechanism of delivery of digital tools	Identified digital tools and prior evaluations	Availability
Agyapong et al [11]	2020	SMS text messaging (specific to COVID-19a)	Text4Hope (specific to COVID-19) enables subscribers to receive 3 months of daily supportive SMS text messages with or without web links to web-based mental health resources.	Only available to individuals living in Alberta, Canada.
Rodriguez-Pulido et al [17]	2020	Web-based Interventions	Beating the Blues is a web-based intervention for depressive disorder.	Available to users in the United Kingdom.
Burger et al [18]	2020	Web-based interventions	Living Life to the Full (2 comparative trials were performed involving a total of 659 participants), Deprexis (6 comparative trials were performed involving a total of 1863 participants), and SHADE (3 comparative trials performed involving a total of 475 participants) were evaluated. moodgym was extensively evaluated, with a total of 11 comparative trials involving a total of 7294 participants. All the above interventions have been evaluated as websites that provide psychological therapy for depressive disorders.	The websites for Living Life to the Full, Deprexis, and moodgym can be accessed.
Anderson et al [19]	2019	Web-based interventions	The Interapy program from the Netherlands was highlighted as a program that assisted individuals with symptoms of depression, panic disorder, posttraumatic stress disorder, and burnout. moodgym was also highlighted as a commercially available option for anxiety and depression.	The websites for moodgym and Interapy can be accessed.
Miralles et al [20]	2020	Mobile interventions	7 Cups, Be Good to Yourself, Bluewatch, Dcombat, Get Happy Program, Headgear, iCare Prevent, MedLink, Mobile Sensing and Support, Moodhacker, Moodivate, MyGamePlan, PRIME-D, Push-D, SocioEmpathy, SPSRS, SuperBetter, The Sound Advice, Thought Challenger, TODAC, Kokoro-App, Agoraphobia free, Stress Free, Angesthjalpen, AnxietyCoach, CBT Assistant, Challenger, Lantern, Psych Assist, Public Speech Trainer, SmartCAT, and GET.ON.PAPP have been previously evaluated and reported in published research.	Headgear, MoodHacker, SuperBetter, Thought Challenger, Angesthjalpen, AnxietyCoach, and SmartCAT are commercially available.
Gaffney et al [21]	2019	Conversational agents or chatbots	Woebot, Tess, and eSMART-TH have been evaluated previously for depressive disorder, SABORI has been evaluated for psychological distress, and Tess has been evaluated for anxiety disorder.	Woebot and Tess are commercially available.

^aCOVID-19: coronavirus disease.