TABLE 3.

Acceptability outcomes. Sample size = 300.

Question	Frequency	Percentage
Did you find the mobile app easy to use?
Yes	296	98.7
No	4	1.3
What steps in the app did you find difficult to understand or follow, if any? †
Sliding the tube into the stand	18	6.0
Swabbing the gums	8	2.7
Taking/saving the picture	4	1.3
Instructions were not clear	3	1.0
No difficulties	274	91.3
If you choose to self-test again, would you be willing to use the app again to help guide you?
Yes	299	99.7
No	1	0.3
If you choose to self-test again, would you be willing to download the app to your own mobile phone?
Yes	298	99.3
No	2	0.7
Do you have suggestions on how to make this app easier to use? †
Add voice/video notes	4	1.3
Add local languages	4	1.3
Clarification of instructions and steps	5	1.7
Decrease phone memory requirements	2	0.7
No suggestions	285	95.0

^†, Values may not add up to 100% as variables are not mutually exclusive.