Giorgos Mpeliris
Thank you Nikos. I listened to rumbles from other users and they have a great sound when it’s stereo. I haven’t been able to create one, although I’ve used the stereo setting. Since yesterday when the application got upgrade, it doesn’t let me. It tells me one or two seconds after I’m starting recording that my recorded was failed. thank you for your response, I really appreciate it. 
Nikos Demetriou
Hi Giorgo. Stereo recording didn't work for me either the last time I tried. For me instead of recording in stereo it uses the top microphone to record instead of the bottom one, but the sound is still mono. My iphone is the XS which is 7 years old now, so I don't know if stereo recording is supported only on newer models. For stereo recording the only option left now, is to record with a third party app such as just press record, and then send the recording to ramblio.