This topic keeps coming up. If you can see all app's installed by someone then you might have the point.
If you can't then an employer would need to search for this specific app and find your account. I guess it is possible that some employers may have a blacklist of hundreds of app's but I would have thought it would be more trouble to maintain compared to the value of having it. Especially considering how tomorrow I could launch "BangWithBuddies" and this app would need to be found, flagged as not appropriate for employees and added to a search list.
If an employer is going to this much trouble to scan for what they believe is moral correctness then they probably aren't worth working for.