The emergence of Location-Based Real-Time Dating (LBRTD) apps such as Tinder has introduced a new way for users to get to know potential partners nearby. The design of the apps represents a departure from "old-school" dating sites as it relies on the affordances of mobile media. This might change the way individuals portray themselves as their authentic or deceptive self. Based on survey data collected via Mechanical Turk and using structural equation modeling, we assess how Tinder users present themselves, exploring at the same time the impact of their personality characteristics, their demographics and their motives of use. We find that self-esteem is the most important psychological predictor, fostering real self-presentation but decreasing deceptive self-presentation. The motives of usehooking up/sex, friendship, relationship, traveling, self-validation, and entertainment -also affect the two forms of self-presentation. Demographic characteristics and psychological antecedents influence the motives for using Tinder, with gender differences being especially pronounced. Women use Tinder more for friendship and self-validation, while men use it more for hooking up/sex, traveling and relationship seeking. We put the findings into context, discuss the limitations of our approach and provide avenues for future research into the topic. percent of married or committed couples in the US met their significant other online, and that 11 percent of the online adult American population claims to have used a dating site at least once in their lifetime (Lenhart & Duggan, 2014). While less data is available for the rest of the world, the market for online dating has seen a similar trend of dramatic growth in countries such as India (Joshi & Kumar, 2012) and the UK (Kee & Yazdanifard, 2015). As online dating becomes more common, the associated level of negative stigma seems to shrink. Consequently, more and more Internet users claim they consider online dating "a good way of meeting new people" (Smith & Anderson, 2015). Part of this change in attitude could be due to the evolution of dating sites into dating apps. Being mobile, in fact, suggests more flexible boundaries between online and offline, yielding opportunities for a "co-situation", i.e. the parallel existence of two individuals in a place that is both physical and virtual (Van de Wiele & Tong, 2014). LBRTD (Location-Based Real-Time Dating) apps like Tinder or Grindr have this mechanism at their core, employing the geographical distance between users as a key variable on the basis of which TINDER SELF-PRESENTATION 4 potential partners can be found. Once users have set their demographics of interest, the algorithm can identify potential dates ("matches" in Tinder-lingo) as near as the same block or even building (David & Cambre, 2016;Duguay, 2016). GPS-based dating apps, more so than traditional dating sites, strengthen the connection between online and offline, giving users an incentive to meet "in real life" (Cohen, 2015;Gibbs, Ellison & Lai, 2011). This has...