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. 2021 Sep 17;23(9):e29085. doi: 10.2196/29085

Table 2.

Reasons for not having the NHS Test and Trace app for those who do not intend to download it and those who downloaded but deleted the app.

Reasons for not having the appa Participants who do not intend to download the app (n=264) Participants who downloaded but deleted the app (n=81)

n (%) 95% CI n (%) 95% CI
I don’t want to be tracked  105 (39.8) 36.8-42.8 22 (27.2)  24.4-30.0
I don’t think it will be effective  80 (30.3) 27.5-33.1 28 (34.6)  31.7-37.5
I choose/chose not to take part in contact tracing in this way  78 (29.5) 26.7-32.3 12 (14.8)  12.6-17.0
I don’t trust the people who built the app  72 (27.3)  24.5-30.1 14 (17.3)  15.0-19.6
The app doesn’t/didn’t work on my mobile phone  28 (10.6)  8.7-12.5 14 (17.3)  15.0-19.6
I don’t have a smartphone  27 (10.2)  8.3-12.1 N/Ab N/A 
I don’t want to be told to self-isolate  16 (6.1)  4.9-7.6 9 (11.1)  9.2-13.0
None of the above  25 (9.5)  7.7-11.3  7 (8.6) 6.9-10.3
I wouldn’t/didn’t know how to use it  12 (4.5) 3.2-5.8 12 (14.8) 12.6-17.0
Don’t know  1 (0.1)  0-0.3 0 (0) c

aMultiple answers were allowed.

bN/A: not applicable, because participants do not have a smartphone, which is needed to download the app.

cThe 95% CI value could not be calculated since there were no participants.