TheBlowers I have been using for a year now and it is the best site for sex. I don't use Grindr anymore. It is full of useless profiles that don't post photos and don't respond, in addition to being many fakes and escorts. In TheBlowers there are obviously fake profiles and escorts and also profiles of guys who don't conclude seriously, but:
1) it has much better functions than other apps (porn photos as profile photos, the map to see where the users are, space for comments from guys met, videos and photos both temporary and in galleries);
2) being a site specifically for giving blowjobs (and more...) those who use it are more concrete than hundreds of Grindr users who are online just wasting time.
In fact, Grindr is losing subscribers, while Planet Romae and TheBlowers are increasing (TheBlowers about 3,000/5,000 new subscribers per day).
Furthermore, Grindr is managed by automated Nazis, there is no human relationship between user and admin like in Romeo and TheBlowers.
I also use:
1) Wapo, but there is practically no one there...
2) Daddyhunt, since I am a nice daddy I use it willingly but at the moment there are still few users.
3) Tinder which for how it works (the Match system) is not effective.
4) Gay-Cruising is more valid as a site to search for cruising areas, but chatting is torture: no one posts photos, everyone is afraid of who knows what, many talk and then do nothing, etc...
A piece of advice? TheBlowers all the way...