Background <p>Although prior studies have examined the psycho-socio-sexual outcomes associated with problematic engagement with online dating apps and pornography, these behaviors remain largely unexplored from an <i>existential</i> perspective. Romantic love can also be viewed through an existential lens (e.g., contributing to one's sense of essence). This study investigated the relatively understudied relationships between problematic online dating app use, problematic pornography consumption, and existential perceptions of romantic love.</p> Methods <p>A total of 664 Iranian adults (<i>M</i>_<i>age</i> = 26.4, <i>SD</i>_<i>age</i> = 7.6) who used dating apps and pornography websites were surveyed. Structural equation modeling was conducted to assess the relationships among the study variables.</p> Results <p>The results showed that, controlling for demographics, problematic online dating app use and problematic pornography consumption were negatively associated with existential reflection on love and perceived meaningfulness of love. Both behaviors were positively associated with a pragmatic view of love and emotional promiscuity. A positive association was found between problematic online dating app use and problematic pornography consumption. Additionally, mindful social media use, which has recently been suggested as a protective factor among social media users, demonstrated a strong negative association with both problematic behaviors.</p> Conclusion <p>Considering the potential for negative experiences associated with online dating app use (e.g., partner choice overload) and pornography consumption (e.g., sexual objectification), problematic engagement with these platforms may, to some extent, contribute to the commodification of romantic relationships and the fragmentation of existential perceptions toward romantic love. <i>Mindful</i> use of these platforms may therefore need to be considered by users.</p>