Table 2.

User experience survey and qualitative interview findings.

Item	Responses, n (%)	Qualitative interview findings	Example quotes
App usability: the Meru Health app was easy to use.a	5 (25): strongly agree; 12 (60): agree 0 (0): neutral 2 (10): disagree 0 (0): strongly disagree	Challenges included difficulty reviewing previous content, typing long answers in response to questions after practices, progress not being saved, crashing, or freezing.	“On some of them [practices] I could pause and rewind and play again, but some of them I could only pause and play.” “I’m a typer as opposed to a tapper. I’m much more able to ramble like I’d like to if I had a keyboard in front of me...I seem to have a better hand at expressing my thoughts when I can go back and quickly edit.”
Communication: the emails from Meru Health were helpful to me.b	9 (45): strongly agree 4 (20): agree 4 (20): neutral 1 (5): disagree 0 (0): strongly disagree	Some expected more communication directly with the therapist. Three were unaware that they would be receiving emails.	“I occasionally got confused whether messages would show up in my email inbox or whether they would show up on the app.” “[emails] would break down the topics, and I think that was fabulous, that was very informative. Without that information, it would have been difficult because it was not really explained, I went back and read the emails a few times, so it would make some sense.”
Communication frequency: the emails from Meru Health were frequent enough.b	11 (55): strongly agree 6 (30): agree 0 (0): neutral 1 (5): disagree 0 (0): strongly disagree	Weekly emails were frequent enough for most participants. Most comments reflected a desire for more personalized communication.	“I thought there would be a little more of the individual therapist or individual communication between the therapist and myself, just a little more of that, a lot more...”
Program length: the Meru Health Program was the right length of time.a	9 (45): strongly agree 4 (20): agree 2 (10): neutral 3 (15): disagree 1 (5): strongly disagree	Six participants recommended that it could be longer (9 to 24 weeks). One recommended it be shorter (4 weeks).	“I think it would be great if the app gives [the] participant a time to choose from, for me 3 months would have been ideal.”

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^bn=18.