I was using Speak Easy with the desk top software and it worked fine until the company updated the App on the iPhone. It no longer would sync with the desk top software so I sen 3 emails to company for assistance and recieved to cursory replies then nothing else when I told them their suggestions did not work. Their support just gave up and stopped so I deleted it because it would not sync and poooooor customer support.
I have since been using Recorder without problem and backup to my PC with the WiFi option.
I tried reQall but it did not stay on long (don't remember why) and it has 2.5 rating in store right now so validates whatever reason I stopped using.
Quickvoice was another tried but removed, did not have sync capability at the time but does now. Still only has a 3 star rating.
Lastly...the reason you are not getting many responses is because its a question that has been discussed before. Do an advance "Voice Recorder" title search. Here is one
https://forums.macrumors.com/threads/537764/