In Pattaya, it probably doesn't matter which app you use, you will find someone on any. For those like me who use the free version, it's rather a question which has the least intrusive advertising or shows the highest number of profiles. Elsewhere in Thailand, most of my encounters are on blued or hornet, so I guess these are the most popular in Pattaya as well. My view might skewed because I don't like that you can't link to profiles on grindr.