Sony | Sound Connect 4+

This app allows you to configure wireless and noise cancelling headphones in the Sony product portfolio. It is versatile and provides excellent headphone personalisation. I am not aware of anything similar from the headphone competition.
Equaliser: This is the feature I like most. My WH-1000XM2 headphones arrived with a ”default” sound signature. For my ears, they had too much bass and the mid-range vocals were lacking. Using the app equaliser, I managed to optimize these ”deficiencies” and now have the best sounding cans I’ve ever owned. Incredibly clean & detailed mids & treble, plus just enough low end thump (10Hz) to warm up the overall sound without veiling the aforementioned detail.
Why not 5 Stars? There is an annoying uncontrollable ”increasing volume” bug when listening without noise cancelling. I’ve submitted 3 reports to Sony via Apple with lots of information and nothing has improved. Come on Sony!

I have been using Sony WH-1000XM4 with this app and the experience so far wasn't good. Firstly, the UI/UX is not straightforward and badly organized. Labels and submenus especially.
When connecting to multiple devices, the app wont recognize any device, pending with message: "Not connected", even though the headphones are indeed connected and playing music.
It is impossible to switch between both devices on the fly with the app. Instead, one place has to stop playing sound and after 7-10 seconds the target input will switch without any notification. A simple "switching audio input" message would be helpful. Finally, third party app configuration is very limited. Sometimes when using multiple device mode and when connected to smartphone, apps like Duolingo and discord wont work with microphone. This is not a hardware issue and could be relatively easy get patched with an update yet the developers do not prioritize these important issues. For the price I paid for the headphones, I was expecting a rather decent companion app. I hope developers and project managers prioritize some more time on this app and their headphones. Thank you.

Where is the option to turn off the annoying button on the headphones?!?? We have all been forced to use wireless headphones but the thing is, they fall out onto the floor. With wired headphones this wasn’t a problem because the wire held kept them attached to your or your phone. So, therefore, I have to continuously, every minute or so, touch the earphones to ensure they are pushed right into my ear, or risk losing them when they fall in the road or grass or wherever. When I do push the earphones in it is almost IMPOSSIBLE not to accidentally press the button on the earphones. This skips the podcast you are listening to or adjusts the volume or does something else you did not want to do. This is especially likely to happen if you are wearing gloves or walking or on the move. You then have to take your phone out, open it up, and start your podcast (or whatever) up again, or adjust the volume back, or do something else. It is INFURIATING. Get rid of the earphone buttons or give us an option in this app to turn the button off!!!!!! I do not see any other reason for this app, it’s pointless.

Do not buy Sony earphones, is my advice.