Use Zoom H5 to Iphone on Zoom meetings?

Hi! 

I give music lessons (classical flute) on Zoom, which works really well when both the student and I use external microphones to the computer.

However, when using the mobile phone for Zoom, this is causing problems. We tried to connect a Zoom H5 handy recorder to an Iphone, but there are severe problems with latency and it "cut offs" the register on the instrument. 

Is there a way to solve this, with a handy recorder + Iphone?

🙂

Ann