Table 1.

Characteristics and comparison of two digital mental health tools.

Title of the mental health digital tool	Friend first aid	Doing what matters in times of stress
Logo
Platform	Messenger	Website
Format	Unguided self-help Telegram-based interventions	Unguided self-help smartphone-based interventions
Therapeutic model or concept	Psychological first aid	Acceptance and commitment therapy, mindfulness-based
For whom	People exposed to traumatic experience within hours—first months	People exposed to adversity
Time invested	Micro-intervention, up to 30 min	5 modules, 20 min each
Languages	Ukrainian, Russian, English	Ukrainian, Russian, English
Access	https://t.me/friend_first_aid_bot	https://dwmatters.eu/