SQ difference between Air Play Lossless and Local FLAC playback?

[stefil]

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what lossless streaming services I can use on my iPhone to stream proper lossless music to my Moode audio RPI?
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I asked myself this question since a decade

Unfortunatly iPhone and Lossless are not "reconcialiable"

A time, best hope was bluetooth Apt-X but Apple won't implement it.
Apple wants you to buy captive products (airpods, apple tv etc.) on none of them handle real lossless (alac on airplay is downscale to CD quality as far as i know) 

Telling that my best experience for lossless is working around with uPnp protocol :

• You should consider you iphone as a remote : Upnp controller with  special apps or via a web ihm 
  
• You have to get an appliance that can handle streaming service : LMS is a good solution and will act as the source of music. you can implement it with a dedicated raspberry or perhaps mix LMS with moode audio, with material skin it's nice on iPhone
  
• Then moode audio will be the Upnp renderer by activating the feature "Upnp client"
  

 
Other option is to get a good DAP with uPnp capabilities and forget about "Apple product"

I will give more details later if you want.

Best regards