1-bit

1-bit is a private, bit-exact music player for iPhone and iPad. Play your own files from a UPnP/DLNA media server, an SMB share, your own 1-bit-bridge server, a folder on your device, or 1-bit Cloud, a private library we host for you. No analytics, no ads, and no account unless you choose the cloud.

SOURCES
• UPnP/DLNA media servers on your Wi-Fi: NAS, MiniDLNA, Plex, a Chord 2Go. Found automatically, streamed bit-exact, DSD included.
• SMB shares on your home network.
• 1-bit-bridge, a free, open-source (MIT) server you run on Mac, Linux, Pi or Windows. Pinned HTTPS, tap-to-pair by Bonjour or QR.
• 1-bit Cloud: the same bridge, run by us. Sign in with Apple, upload from any computer, and it appears in Sources. 20 GB free. Strictly private, downloadable bit-exact, deletable in one step.
• Any folder on your device or an external drive, picked in Files, nothing copied. Download for offline play.
• No server yet? Add the read-only demo library in one tap.

AUDIO
• Bit-exact PCM (FLAC, WAV, AIFF, ALAC, MP3, M4A) up to the limits of your DAC.
• Bit-exact DSD over DoP for DSF and DSDIFF, up to DSD256, with a USB DAC that reports DoP lock (Chord, iFi, Topping, Mytek and others).
• DSD on any output: AirPods, AirPlay, CarPlay and the speaker play DSD converted to PCM on the phone and labeled as such. A wired DAC still gets the untouched path.
• SACD .iso rips open into per-track rows; DST-compressed DSDIFF decodes as it plays.
• Gapless when adjacent tracks match. Per-DAC tuning, anti-click rate switching and thermal-aware buffering keep DSD256 smooth.
• Spatial audio (beta): a binaural renderer with head tracking on supported AirPods. PCM only.
• Large FLAC, WAV and AIFF files can start while they download (optional).

LYRICS
• Synced lyrics that follow the music line by line, from the file's tags, a sidecar, your bridge, or an online source you switch on yourself. Tap the artwork on Now Playing.

SEE WHAT YOU HEAR
• Signal Path shows what actually reached your DAC, with an optional live spectrum and true-peak analyzer.
• Whole-track analysis answers "is this really hi-res?"; a bridge adds dynamic range, key, tempo and a FLAC checksum that flags an altered file.
• Profile my DAC: guided measurements you can send in so your hardware gets supported properly.

VOICE, SIRI & CARPLAY
• "Hey Siri, play [album, artist, playlist, or genre] on 1-bit". Shortcuts and Spotlight too.
• CarPlay: Recently Added and Played, Artists, Albums, Playlists, Favorites and Downloads, A to Z indexed, with voice search and Shuffle. Its browser lists PCM; DSD started from the phone plays converted.

HOME MIXES (WITH A BRIDGE)
• Your bridge builds mixes from your listening: Heavy Rotation, Daily Mix, On Repeat, Favorites and more; they can cache overnight for offline play.

OUTPUT
• Play through a USB DAC, AirPods, AirPlay 2 or the speaker, or cast to a DLNA renderer such as a Chord 2Go.

LIBRARY
• Fast enough for 50,000+ tracks across every source; the first scan carries on overnight while charging.
• Browse by artist, album, composer, genre, folder, playlist or a flat Tracks list, with an "Appears On" section. Search everything, filter by source.
• Heart tracks and albums; Favorites can follow you across devices with a bridge.

PLAYER
• A redesigned Now Playing with a waveform scrubber; the floating player arrives on iPad.
• Resume where you left off. Home Screen widget, Lock Screen and Control Center transport, sleep timer, optional crossfeed.

BRIDGE EXTRAS
• Upscaling and DSD-to-PCM renditions made on your own hardware, the original always one tap away.
• Atlas notes and better cover art; backup of playlists, favorites and playback history to your own bridge. All off by default on a bridge you run.

PRIVACY
• No analytics, no tracking, no ads. Optional lookups are off by default; passwords and tokens live in the iOS Keychain. The only server of ours that holds anything is 1-bit Cloud, and only if you create a library.

Requires iOS 26.1 or later.