Objects in the night sky

For the past week or so, I’ve been looking in the night sky between 9:15 and 9:40 pm and have seen at least 5 illuminated objects going through the sky per night that I don’t know what they are.

Each of them looked like stars moving across the sky and would appear and disappear at different points. They aren’t shooting stars, the speed is relative to that of a satellite and they look like satellites.

I’m 1000% sure what I’m seeing is not airplanes. Airplanes are easily noticeable by their blinking lights and move very slowly across the sky at high altitudes. What I’m seeing is much much higher (outside the atmosphere) and move rather quickly across the sky.

At first I thought they were satellites because that’s exactly what they look like. Then I got my night sky app out which displays satellites and each time there were no satellites visible on the app.

I believe these objects are visible during the time frame mentioned above not because they are illuminated, but rather that’s the only time the sun’s reflection off of them make them visible. This would also explain why the visibility of these objects fade in then fade out at different points of the sky.

These objects move in straight lines while visible and travel in no particular order or direction. I wouldn’t say they were extraterrestrial in nature as the movement appears to be able to sustain human life (not whipping or zigzagging).

What are these things?