The adjustable volume helps with calls from people that are soft spoken, vs. I initially played with the mouse wired and then played in wireless mode to see if I could tell a difference. Picture added to show you can’t hear eye rolling over the phone! For me, the only reason to use the app is to check the battery remaining in each earbud or to remember what the touch controls are. This perfectly suits my needs. I am going to enjoy wearing these! These are the perfect headphones. This one is not flimsy and the charging port has a nice closure. Its great for warmup or cold weather to keep your core temp up. 5 or 13, my feet would not fit at all.