Good quality audio recording accessory for Android


AC Question

I need filming things , I am happy with video quality of my Galaxy s6 but not the audio, so I am asking for a solution.
A microphone ( preferably wireless) or any other solution that provides a good sound quality in indoor and outdoor and does not costs more that 100 dollars.
*I know that i can record the video with phone and record the sound with something like Samson Go Mic in computer and the re-synchronise the audio but it is too complicated.*