I read online about a portable voice recorder (MemoQ) that some use for video making. It has the size of a usb stick and a clip on. The portability of the thing is perfect. I made a quick comparison video in different sound settings for the MemoQ recorder you’re talking about here and the SmartLav from Rode that you plug into your phone. https://youtu.be/OB-YzmsIqe4
Hope this helps other people. Thanks!
MemoQ used: MR-740 4GB (http://a.co/jjLQGhl)