Contextual factors in geosocial-networking smartphone application use and engagement in condomless anal intercourse among gay, bisexual, and other men who have sex with men who use Grindr

Given that 57.5% of respondents had engaged in condomless anal intercourse in the preceding 3 months and the associations of app-use contexts with condomless sexual behaviours, these findings suggest that reductions in substance use may lead to safer sexual practices among MSM who use apps to meet sexual partners.