Doppler vs Refrain
Two local-only iPhone music players, one paid and one free. Doppler is the more polished player; Refrain does more to fix a library that arrived messy.
Both play music files stored on your iPhone, with no streaming service and no cloud behind them. Doppler is a mature, carefully made player with a one-time price of around $9 after a week's trial. Refrain is free with no in-app purchases and puts more of its effort into getting a messy library into shape — batch editing, Wi-Fi transfer, synced lyrics — than into the playback experience itself.
If you have a well-tagged library and want the nicest player for it, Doppler is a genuinely good buy. If you have a folder of downloads with the wrong artist on all of them, start here.
Side by side
| Doppler | Refrain | |
|---|---|---|
| Price | Free 7-day trial, then ~$9 one-time | Free, no in-app purchases |
| Works fully offline | Yes | Yes |
| Formats | MP3, FLAC, WAV, AAC, M4A and more | MP3, M4A, AAC, WAV, FLAC, AIFF |
| Wireless transfer from a computer | Yes, via its own tools | Yes, browser drag-and-drop, nothing to install |
| Editing artist/album/artwork | Yes, per song and per album | Yes, any selection at once |
| Writes tags back to the file | Yes | No, library display only |
Synced lyrics (.lrc / .srt) | No | Yes |
| Full-screen lyrics for a room | No | Yes |
| Equalizer | Yes | Yes, ten-band |
| Visualizers | No | Eight |
| CarPlay | Yes | No |
| Account required | No | No |
Doppler details checked 7 August 2026 against its App Store listing (v3.2, updated February 2026). Prices and features change — tell us if this is stale.
Where Refrain wins
It is free, with nothing held back. No trial, no tier, no upgrade prompt. Every feature described here is simply present.
Batch fixing a bad import. Both apps let you edit song and album information on the phone. The difference is the shape of the selection: Doppler works per song and per album, Refrain lets you tick any arbitrary set of tracks — a search result, fifty unrelated downloads, everything that imported this morning — and set the artist, album and cover for all of them at once. When a folder of AI-generated tracks arrives as fifty separate "albums", there is no album to edit yet, and that is exactly the case Refrain is built around.
Synced lyrics, and a full-screen mode for them. Drop an .lrc beside the song and the
words scroll in time. Presentation mode strips the screen bare and scales the type for
reading across a room, which makes a phone into a karaoke screen over AirPlay. Doppler does
not do lyrics at all.
Wi-Fi transfer with nothing to install. Refrain shows an address and a code; you open that address in any browser and drag files onto the page.
When Doppler is the better pick
Plainly, in several cases.
You want your tags written into the files. Doppler edits real metadata. Refrain deliberately does not touch your files — it changes what the library displays, and that change does not travel to another player or another device. If you are curating a library you intend to keep for twenty years, that difference matters and Doppler is on the right side of it for you.
You need CarPlay. Doppler has it. Refrain does not, and is not claiming it is coming.
You want the more refined player. Doppler has been shipping since 2019, it is well-reviewed, and the attention to detail in playback and browsing shows. Refrain is new.
You want to pay once and be a customer. A paid app with a named developer and a support commitment is a reasonable thing to want, and $9 once is not a lot for something you use daily.
Moving your library across
There is nothing to migrate in the usual sense, because in both apps the library is just files you imported. Point the new app at the same source folder.
If you have been editing tags in Doppler, those edits are in the files, so they come across to Refrain intact — which is a good argument for doing the tagging in Doppler and the listening wherever you like.
Going the other way, edits made in Refrain do not exist in the files and will not appear in Doppler. Expected, and the reason the editing guide says so up front.
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Last updated 7 August 2026