Playr Audibly 4+

Not iPad-native (but does run).

Sync is off, although close-ish. OK for having music in separate rooms, where you can't really hear multiple devices well at once. (Maybe mic could be used to correct?)

Only plays local downloads, yet shows your whole cloud library that can't be played--you have to sift through masses of songs that don't work to find the local ones that do. They shouldn't be shown.

Makes you turn off Bluetooth instead of simply not using it. Big problem for users of Apple Watch, Bluetooth keyboards, etc.

On the bright side, it's a neat idea and very easy to use. Looking forward to any future developments, although it has been a few years.

Ever since Seedio was shelved years ago I’ve been hoping for a replacement and this app doesn’t disappoint. One thing though, the synchronicity feature needs to be able to negative for me to use it to it’s best. Other than that and some minor teething troubles it’s golden.

This is an awesome idea, and I'd very much like to have the app to use! The interface is simple and effective, and it all looks wonderful. Yet there are absolutely things that could be improved.
Of course, I'm sure the synchronization is very hard to perfect in terms of software, but the fact remains that syncing the music is pretty much the biggest part of this app/concept. When I tried it out between my iPod and iPhone (former broadcasting, latter listening) it sounded as though the iPhone was playing the music a little slower than the iPod. The beats seemed different, thus there was a slight delay (which I suppose could be acceptable, though frustrating as all hell).
If this could somehow be remedied I'll be forcing the app in my friends' faces right away!