The difference of the free version is that there is a shuffle function and a repeat function and an equalization function. Sync function is available from Android2.3.
Features:

* Play only the current track
* Repeat the current song
* Play all songs (free version)
* Play all songs repeatedly

Supported Android

{4.0 and UP}
Supported Android version:-
Jelly Bean (4.1–4.3.1) – KitKat (4.4–4.4.4) – Lollipop (5.0–5.0.2) – Marshmallow (6.0 – 6.0.1) – Nougat (7.0 – 7.1.1) – Oreo (8.0- ) 8.1) – Pie (9.0)

Download Simple MP3 Widget Player 1.5.0 Paid APK for Android

Simple MP3 Player (playback widget) -1.5.0.apk