[App_rpt-users] Best IAX client to use under IOS?

I am getting away from using the Echolink client due to some issues I have encountered with the IOS version and wanted to see if anyone care to share which is the best IAX client to use under IOS? I have been using Zoiper, but I and others have found that it gets stuck and you lose control of the PTT function occasionally. I have tried a few others like Adore and IAXdialer, but have had no success. Thanks in advance. Lu KA4EPS