No one will successfully clone Grindr outside of the gay hookup space (nor will Grindr be successful with their non-gay-sex app) because there are no other potential applications with the same imprimatur, except sexual hookups in other scenes (i.e. plentyoffish, or justlunch).
Unless you're horny, proximity and timeliness simply do not matter so much, and any application outside that scene is simply a gimmick, unless you have an application truly unique and compelling.
1. Gay men want to fuck.
2. Someone close by.
3. NOW.
No one will successfully clone Grindr outside of the gay hookup space (nor will Grindr be successful with their non-gay-sex app) because there are no other potential applications with the same imprimatur, except sexual hookups in other scenes (i.e. plentyoffish, or justlunch).
Unless you're horny, proximity and timeliness simply do not matter so much, and any application outside that scene is simply a gimmick, unless you have an application truly unique and compelling.