Table 5.

Quotes from service user consultants (n=11) during think aloud testing sessions.

Theme	Quote
Enjoyment	I really liked the safer thoughts and the colours on the positive safer thoughts Using haptics would be good… adds another layer The swiping [screen interaction] is difficult in places. I would find this frustrating
Usability	Ease of access is the biggest positive It's not difficult to add worries and sometimes people are afraid of technology, but I think it’s not difficult to use this app I feel like I can navigate around it and haven’t spent much time on in… It's pretty intuitive
Usefulness/Acceptability	I like you don’t need to share all of your thoughts with the therapist …sometimes you don’t want to show your thoughts to other people I like that it’s really personalised, I can’t count the amount of times that I have been given something that has not been in my own words in therapy