No. Audio cache, downloaded albums and imported local files are excluded from iCloud backup so they never inflate it.
Features
Offline, verified, never silent
Streaming from your own server is great until the network drops. RoadSonic treats offline as the normal case: a pinned reserve, resumable album downloads and an on-device index that never needs the server to answer.
A pinned reserve of complete tracks
Choose 20, 30 or 60 minutes in Settings › Audio cache. RoadSonic keeps that much fully downloaded, verified audio on the device at all times, refills it while you listen and shows “Ready for the road” once it is complete.
Album downloads you can trust
Download any album for a road trip. Downloads are visible, resume after a lost connection, are verified after transfer and are never evicted automatically. Choose a cache budget of 2, 5, 10 or 20 GB; RoadSonic manages the rest.
Search and browse without a connection
The whole library — artists, albums, tracks, favorites, play counts — is indexed on the iPhone. Search, alphabet navigation, sorting and smart playlists work offline, instantly, even when the server is slow or unreachable.
Frequently asked questions
The oldest unpinned files are evicted first. The reserve and downloaded albums are protected; you can raise the budget up to 20 GB in Settings.
Apple Music downloads and cache are managed by Apple. Protected tracks are never copied into RoadSonic's cache.
Go deeper
Your music server on CarPlay
RoadSonic was designed for the car first. The CarPlay interface shows exactly what you need while driving — and keeps playing through tunnels thanks to a verified reserve of complete tracks on the iPhone.
→Synchronized lyrics and karaoke
RoadSonic shows the words of what you are playing, synchronized with the music, and turns any track into a karaoke session — from your own files, not from a streaming catalog.
→Sound you control, per output
The same album should not sound the same on the car speakers and on in-ear headphones. RoadSonic keeps a separate sound profile for every output and recalls it automatically.
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Free to try, yours forever
Download for free and enjoy a full 7-day trial that starts after your first library sync. Then a single one-time purchase unlocks RoadSonic for good. No subscription, no ads.