I think I am going to punch the next person who tells me their app or online service are "fun"! I hate describing smartphone apps or software as "fun" because they aren't. Sports are fun. The movie theater is fun. Driving fast is fun. Sex is fun. Your damn app ain't sexy nor fun!!!
I'll agree that there are certain apps or services which are "fun" to use in their own way (games, social stuff) but I'm coming at this more from the marketing perspective. People DO NOT use apps first and foremost because they are fun. They use them because they are beneficial to them. They ADD value. The help kill time. They make you faster, more efficient, effective, connected, communicative and so forth. Don't use the word "fun".....seriously, stop!
A bunch of people tweeted recently that it's most important to ponder how a user will describe your app or service to another potential user. So true!!! Worry about what they will say to other users more than worrying about what you say to them about your app. Even better, let them do all the talking instead of using a stupid buzzword to tell me about what you are offering.
"Fun" is a lazy adjective. It is hard to measure and you think it's savvy to use the word but it's not. "Effective", "fast","game-changing"......those are hard. They require you to have something really innovative or technologically superior. You want users telling their friends and colleagues "you have to check this out" or "get it now". I reacted that way after downloading CardMunch. I tell everyone how great and useful this app is (right after photographing their business card and handing it back to them). Same goes for Spotify. I couldn't stop gushing about the availability of music and so forth. Shazam is another one. I never say how "fun" I find using the app. I always say first and foremost how amazing it is that it recognizes practically every damn song I ever used it for. Think about all of this the next time you are describing YOUR service or app.