Does it absolutely work with no internet?
Is there an Android app?
Hi,
I have owned the R7 and then sold it to get it's bigger brother the R9. They work similarly. So Ic ana nswer your questions.
1°) Will the R7 work without internet at all ?
Yes. It will. You can just attach a USB Drive to it and let your favourite app (the in-house Fiio Music can do, but you can find better ones) index the whole content of your drive and you can play that music with no connection to internet at all.
Then if by "With no internet" you mean, not network connection at all, be it wired or wireless, please note that you won't have any way to remote control the device, even with the Fiio Cast app that requires both devices to be connected on the same network.
But if you have a network, but no access to internet, you can of course connect both device to the same Wi-Fi network (even without internet) and use Fiio Cast or, even better, use an app to cast from your Android phone to the R7.
2°) About the Android App.
Not sure what you mean here so if you could be a little more explicit...
To tell the whole story : I use the R7 this way.
I have ripped a lot of my CD's to my computer and then transferred the rips to a USB drive (even 2 USB drives).
Those drives are hooked to the R7 with a small "USB hub" and that workds flawlessly here...
I installed an app called "Emby Server" that you won't find on the App Store but that you can download directly from their website.
It then installs like a regular android file as it is a .apk file.
Launch that and then you can set up your own media server.
Once done (the indexing takes quite a long time), you can get any third party app on your phone that have streaming abilities (Symfonium, BubbleUPnp, mConnect, Emby client, Neutron...) and connect to the Emby Server on the R9 (requires both devices to be on the same network but I do not think it requires internet access).
That way you can browse a perfectly organized library...
You can also install apps like Neutron or USB Android Player Pro on the R7 and enable them as receivers. Then from your device you can browse the music through the R7 and playback to the required app. If you use Fiio Music, most third party apps will stop playback after one or two tracks...
Hope this helps
Regards