For transferring Spotify music to iTunes, just select the downloaded music and click the Add to iTunes button, or right-click the songs and select Add to iTunes Library. How to transfer music library from pc to mac. After that, you can find those music are shown in the SAR playlist of iTunes.
If you want to download mp3 from Spotify directly on your iPhone, there is an app call Telegram that can do it for you. It’s totally free to use.
Please learn how to download Spotify with Telegram bot by following the video guide below