Merge Audio: MP3 Joiner

Merge Audio joins songs, voice notes and the sound of videos into one MP3 — right on your phone, without internet. No gaps between files. No watermark. Your files never leave the phone. ANY FILES TOGETHER MP3, M4A, WAV, FLAC, OGG and the sound of videos — different formats and quality go into one file. Add as many as you like. HEAR THE JOINS BEFORE YOU SAVE The player shows the wave around the playhead and every join with the name of the next file. Drag the wave to rewind, jump to the next or previous join, tap a file to play from its start. Drag ≡ to change the order. NO GAPS Silence at the end and start of files is cut at every join, so songs follow each other tightly. CROSSFADE OR PAUSE Each song fades into the next over 1 to 10 seconds, like a DJ mix — or put 0.5 to 5 seconds of silence between files for lessons and audiobooks. Set it with a slider and hear it at once. SAME LOUDNESS Quiet voice notes and loud songs sound equally loud in the result. WORKS IN THE BACKGROUND Joining hundreds of files? Leave the app — the progress stays in the notification, with Cancel. FREE, ALWAYS Join any number of songs, voice notes and videos back to back, MP3 192 kbps, with the player. Ready files go to Music / Merge Audio. PRO, ONE-TIME Crossfade 1–10 s, pause 0.5–5 s, same loudness, quality 128 or 320 kbps. Pay once, keep it forever. No subscription. PRIVATE BY DESIGN Everything happens on the phone itself. The app has no internet permission, so it cannot upload your files. No account, no tracking. The app speaks 22 languages: English, Русский, Español, Português, Bahasa Indonesia, العربية, 日本語, Türkçe, Français, हिन्दी, Deutsch, 한국어, Tiếng Việt, ไทย, Italiano, Polski, বাংলা, اردو, 繁體中文, Nederlands, Bahasa Melayu, Українська.

New version: faster, more stable.