I've found an easy way to listen to FLAC on your iPhone / Android / WebBrowser!
I am not affiliated with anyone, I'm just a user who looked everywhere to get FLAC on my iPhone
You allow AudioGalaxy (used to be a P2P site in 2002, now its a 100% legal music streaming site for music that you already own) to gather information about your library, then just start streaming
Theres an app in the iOS store and the android store.
Without saying more, I recommend you read the lifehacker article above.
With the software installed, you're instantly ready to stream tracks through the Audiogalaxy player online, or through your phone. Create playlists, shuffle your entire collection, pick out particular albums or artists, and, if you'd like, have those playlists sync back through your iTunes library. It took me literally five minutes to get Audiogalaxy up and running from my main PC laptop to an Android phone, a MacBook, and even a Chrome Incognito browser, just for the heck of it.
Its super easy