Merge Audio: MP3 Joiner
Lossless audio editor & cutter
Free · Designed for iPad. Not verified for macOS.
Merge Audio combines several audio files into one and, when the sources are compatible with each other, copies the sound as it is: no second compression and no quality loss.
The verdict appears before you export, not after. If re-encoding is needed, the app names the track that causes it and the reason: a different sample rate, a different channel count, another codec, or a setting that requires processing. The choice stays with you.
LOSSLESS JOIN
- MP3 frames are copied one by one, and AAC or ALAC packets move into a new container.
- The result sounds the same as the originals.
- An honest note: every seam keeps the padding added by the original encoder, a few hundredths of a second. It is inaudible in speech, chapters and podcasts; truly gapless music is better re-encoded.
TRIM ON THE REAL WAVEFORM
- Tap a track and set its start and end with two handles over its waveform.
- Trimming does not re-encode either: whole frames are dropped and the rest is copied byte for byte.
- The cut snaps to the nearest complete frame.
OUTPUT FORMATS
MP3, M4A (AAC), M4B audiobook, WAV, FLAC and Ogg Opus. Automatic mode keeps the source format, which is what makes the lossless path possible. Bitrate, sample rate and channels can also be set by hand.
M4B AUDIOBOOKS
Each track becomes a chapter with an editable title. Title, author, album and cover art can be added.
PER-TRACK ADJUSTMENTS
- Gain in decibels.
- Fade in and fade out.
- Transition into the next track: direct join, silence or crossfade.
- Loudness matching at -16 LUFS with true peaks limited to -1 dBTP, per track or treating everything as one program.
WORKFLOW
- Reorder by dragging, with undo.
- Listen to the mix and to the result inside the app.
- Export with progress and cancellation at any point.
- Save the file or share it.
- Local history with date, tracks, duration, size and whether the join was lossless.
EVERYTHING ON YOUR DEVICE
Audio is processed entirely on your iPhone or iPad. No files, names, paths or history are uploaded. It works without a connection, contains no advertising and sends no analytics or tracking data. Only the files you pick are read. No account is required.
MADE FOR
Podcasts and interviews, audiobooks and chapters, voice notes and long messages, recorded lectures and talks, music takes that run one into the next.
Open-source components: LAME, FLAC, Opus and libopusenc, with their licenses and source included in the project.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Antonio Gonzalez de la aleja german, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Antonio Gonzalez de la aleja german
- Size
- 6.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 73 more
- English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bengali, Bosnian, Bulgarian, Burmese, Cambodian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, Galician, Georgian, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Kyrgyz, Laotian, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Mongolian, Nepali, Norwegian Bokmål, Oriya, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Simplified Chinese, Slovak, Slovenian, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, Welsh, Zulu
- Age Rating
4+
- 4+
- Copyright
- © Enzodev 2026