Android Directory Player


Screenshots of 1by1 for Android

Best folder sound in your pocket

1by1 for Android is a minimalistic but powerful audio and music player with smart features as crossfading, audio enhancing and more. It appears like a file manager and plays audio files directly from your folders. There is no need for fuddling with playlists or media databases. 1by1 concentrates on simplicity and good audio. It does not waste your time and your battery with cover art or visualisation fireworks.


Resume play remembers track and position · Resume for different folders

Supported file types (depending on the system): MP3, OGG, AAC, MP4, WAV, FLAC, OPUS (Note: OPUS only with OGG-extension in Android 5 and 6)

DSP features: Audio enhancers for normalized volume and powerful sound · Gapless and Crossfading · Fast Play · Partial mono mix · (DSP needs "Internal decoding" enabled in settings on Android 4.1 or newer)

Exportable internal playlist · M3U playlist support · Webstream play (by direct URLs in M3U playlists) · Bookmarking of tracks or lists · Directory finder · Sort modes · Shuffle · Repeat

Track coloring by month or name · File search (Usage: long press on a folder) · Configurable functions for tap, long press and remote previous key · Sleep timer · Very small app size · ad-free

Download 1by1 for Android

Version 1.27 · 2021-07-17 · 172 KB · Freeware
APK file for own Installation
Install on Google Play
MD5 checksum: 715276bb5c70d52a0f701bb5dd3fa599


1.27Crash on older devices fixed · Some corrections
1.26Audio focus usage · Phone state permission removed · Minor improvements
1.25Crash fixings · One more headset connect mode · Minor changes
1.24Remember folders feature · Stop on headset connect option · Some improvements
1.23Enhancer adjustments and import · Fast play improved · Minor changes
1.22Buttons slightly improved · Internal improvements
1.21Mini fade-in on resume · Themes · Bold folders · Italian translation
1.20Optional fade on stop · Some improvements
1.19Fix unreproduced crash
1.18Spanish translation · possible bug related changes
1.17Context open action · German translation
1.16Possible ENH2 overdrive fixed · Sort on present lists
1.15Crash fixing
1.14Native DSP: Enhancers, Fast play, Gapless/Crossfading


Wake lock (prevent from stop on screen off)

Write external storage (track delete, playlist export)

Read external storage (folders, audio files)

Bluetooth (stop on connect option)

Internet (webstreaming)

FAQ - Frequently asked questions

Usually it plays the common audio formats MP3, AAC, MP4, OGG, OPUS, FLAC, WAV. As 1by1 uses the system decoders, the supported formats depend on the device, usually they should all be present. On many devices also MP2 is supported. Older devices may not decode OPUS - or only if the files have the OGG extension. On MP4 only the audio track will be played. M4A is also supported.

A newly started blank 1by1 shows a root folder without any tracks. But they are right around the corner. If the music is on the device's storage, storage/emulated/0/Music may be the location. You also could reach your files under storage/emulated/0 or mnt/sdcard. If the audios are on a removable media (microSD), they should be under something like storage/1234-5678. Be sure to accept the storage permission, otherwise nothing is shown. Once you started a track and quit 1by1, it will remember the location and show it directly on start.

Folders can be sorted by name, date, month or be shuffled. Month means that all tracks of a season can be together regardless from which year they are. Unfortunately some Android versions destroy the file date on copying. M3U playlists can be sorted by name, path, original order and also be shuffled.

Audio enhancing, normalize, mono-mix, and transition mixing need 'Internal decoding' enabled. You find this switch in the settings. To (un)check it, play must be stopped before. Below you can enable and adjust the DSP features. To quickly toggle enhancer and mono-mix, you can also use the Sort menu.

Yes, it can. The URLs must be listed in an M3U playlist file - and directly point to the stream. So it may be necessary to find the stream URL before. Sometimes it must be extracted from a PLS or M3U playlist file. 1by1 can play different streams from one M3U. To show the stream name instead of just the URL, also the #EXTINF name above the URL is shown within 1by1.

Copyright © 2021 Martin Pesch