1by1 vs Musicolet Music Player

Gapless play, transition overlapping, audio enhancer, cue sheet support, playlist support, favorites, theme presets, global hotkeys, and more.

Very small size, low resource usage, and portable.

Remembers last track and position.

You can select presets or customize the whole listening experience.

Gapless play is supported. You can add transitions so that the last ten seconds melt into the first of the next song. There is an intro scan where you can fastly find a certain song. When you drag the wheel to the maximum, the loudness is better than with other players.

You can adjust every single color. And adjust everything else.

You can change everything, including shortcuts that also work in other apps.

You can optionally support the developer and pay for pro features, but the free version isn't missing any core features.

Intuitive options to decide what to do when song or "queue" ends.

Supports many audio formats natively, as well as all formats supported by the system decoder of the Android device in use.

The app doesn't include the Internet permission, so no user data can be sent to the app author.

You can multi-select songs to add to a playlist, and you can use your finger to drag one or multiple songs to the desired position in the playlist, for example. There is also a command to insert a selection of songs into the current playlist after the current song.

Also allows saving unlimited playlists for later use, and playlists can be exported as external .m3u files.