Voice recording on iPhone by using Safari and HTML5

Question

I am developing a simple web application which only records a voice from microphone but I have some trouble.

HTML5 voice recording function works well on chrome and

Answer 1

May 2018 Update (because figuring this out has been tough with all the outdated info).

I found this demo that proves it is possible: https://kaliatech.github.io/web-audio-recording-tests/dist/#/test1