An applaud which has no rhythm is permissible, as it is not Derech Shir - musical. Regarding clapping when singing, see here. Sources: ראה שו״ת אז נדברו חלק…
An applaud which has no rhythm is permissible, as it is not Derech Shir - musical. Regarding clapping when singing, see here. Sources: ראה שו״ת אז נדברו חלק…