@BelugaApp, @emoti.for.iphone and @BumpTech are apps witch use Facebook single sing-on. That is, their are app providers witch value their customers, and are willing to doing hard work to let their customers work less.
As you may now, Single sing-on let users with Facebook app installed and in use in iOS and Android, can login with a single tap if the app provider has done his homework.
Earlier I've verified that @Instapaper, @Diptic and @MealSnap also was prepared. So here is the list as of today:
But still I've almost 140 apps in my iPhone without Facebook Single sign-on! Why? There is more than 6 months since the feature was provided by Facebook. I cannot imagine other excuses than ignorance of UX and laziness.
Since the latter may be a bit offensive, I've posted questions to many of the apps providers on their policy on the matter. When I receive answers I tell you. But so long, to me it appears that more than 90% simply doesn't care…
I thought we was working in the most UX oriented part of IT. But now I don't know…