Canucky matt has it rough but as such is right.
Forget apps, thats for short time partners for some fun, try real meets.
Start to learn -also read- Thai now right away. IF any of those modern time thingies will work for you, it will be the only in Thai ones.
Latin always, always overcharges it and likes to play the naughty boy. But in essence the warning is right: in Thai-farang relations it will be expected of the whitey to cough up in most cases-be lucky in that for str8 this will even be much more the case. Really equal relations are said to not exist at all in Thailand here-or this may be some western disillusion. If you happen to have scored some ´teach the phaasaa angkrit=/en/ language or the like job-do not expect to be able to live a rich person´s life on that.
For some amusing reading and long time struggles in how to cope with live in TH and with Thaiguys-on a minimal outlay: christianpfc.blospot.com