Table 1.

Features used for k-means clustering.

Feature	Description
Unique days	This is the number of unique days the user accessed the chatbot.
Tenure	This is the number of days between the first use and last use of the chatbot.
Mood logs completed	This is the number of times the user recorded their mood over their period of use of the app. This gives an indication of how many times the app was used as the user’s mood was requested each time they used the chatbot, there may be multiple mood logs for each day.
Conversations accessed	This is the number of conversations accessed during their period of use of the chatbot.
Total interactions	This is the total number of interactions with the chatbot.