You can't recover deleted content. These applications that pretend to recover the items are either fake or don't work. There is no way to recover the items if no backup was done in the past. Alternatively, there is no application with support for the file system on the Internal storage partition. If the content was stored on a SDCard, then you can recover the items by connecting the SDCard to PC through a card reader and using a recovery application. In this case, Recuva is recommended as being the suitable application.