If you want your iTunes Library on your iPhone for free, the only real option is to sync it manually.

Apple has several options available, each with benefits and drawbacks. If your aim is to access your old iTunes Library on your iPhone, the good news is that it's possible, the bad news is that it's not quite as simple or free as you might hope. Still, it’s the end of an era (and maybe a welcome one), and if you want to be absolutely sure your library survives, take action while you still can. iTunes continues to work on older versions of macOS and Apple has so far left the Windows version functional and intact. While iTunes may be dead in the newest versions of macOS, it still lives on elsewhere. The iTunes Music Store also lives on inside the Music app, giving you the option to purchase your music instead of subscribing to a streaming service.

While Apple Music is a subscription service that costs $10 a month much like Spotify, the Music app on iOS doesn't require a subscription and now performs the duties that iTunes had before it, including syncing. Accordingly, your iTunes library as you knew it, with all your purchased music, should be available inside the Music app, which you can find with a quick Spotlight Search if you hit Command + Space Bar and then type in ' Music.' With the demise of iTunes, the Music app has inherited some of the older apps features.

Sync iphone to new itunes