You can give permissions to collect your health data (steps and sleep data) under user account settings (Settings -> Permissions -> Health).
Currently, you can collect data in Mentastic about steps, sleep, geolocation (this data will be aggregated to understand how many places you usually visit during the day - e.g. home, work, other outgoings).
We’re continuously working on enabling Mentastic to be able to collect more data (additional health data which can be related to mental well-being, social media data, phone usage data etc.).