I assumed it meant using a separate device or software on the side
That’s what it is. I remember actually sideloading apps to my BlackBerry 10 devices (Z10 and Z30) (though it really wasn’t that long ago not to remember it…) using a PC with a Chrome based browser (though it worked on Firefox too with some minor fiddling) to push and install .bar files to the phone. That is what sideloading to me.
Now this term changed, so everything you install from a different source than the built-in appstore is called sideloading, which is ridiculous IMO.
That’s what it is. I remember actually sideloading apps to my BlackBerry 10 devices (Z10 and Z30) (though it really wasn’t that long ago not to remember it…) using a PC with a Chrome based browser (though it worked on Firefox too with some minor fiddling) to push and install .bar files to the phone. That is what sideloading to me.
Now this term changed, so everything you install from a different source than the built-in appstore is called sideloading, which is ridiculous IMO.