One difference I've noticed is that with Magnet, if you have a window 'maximized' by dragging it into the top of the screen or pressing the shortcut for it, when you start dragging it down from the top of the screen to unmaximize it, it instantly returns to its original size, whereas with Rectangle it stays maximized for some time after you start dragging it which is pretty annoying.

Another thing is the way Magnet moves and resizes windows seems to create less visual 'flashing' than Rectangle's method, for instance Rectangle will resize, then move, then resize again when maximizing a window, which can create a really pronounced 'flashing' effect. That's not to say Magnet has no 'flashing' ever, there's certain situations where it does and to my understanding it seems necessary due to the limited nature of moving and resizing windows on macOS (I guess you have to do one then the other and can't both move and resize simultaneously?), but to me Magnet's methods often look visually better.

Rectangle is great though, I've switched to it from Magnet and these are just some minor gripes.

Rectangle Pro user here -- biggest frustration I've had is configuration. While the GUI is nice for seeing all the options and some basic stuff, when it comes to actually configuring App Layouts it's been a nightmare of clicking around. I went so far as to export my config so I could modify it with a text editor and then re-import it but the config itself includes serialized JSON as values so to accomplish what I wanted to I had to de-serialize the json, make the changes I wanted to, re-serialize it, then re-import it back into Rectangle, all while hoping I didn't mess up the re-serialization step. This ended up taking more time than if I had just painfully clicked through the interface.

Personally, I wish Rectangle had the option of storing configuration in a simple dot file in my home dir but I understand that would prevent syncing through icloud, which is a feature I imagine a lot of folks like. Barring that, I wish rectangle could export/import the configuration in a more editor friendly way so I could make these configuration changes much faster and more easily ensure consistency across settings.

Are you the Rectangle dev? I appreciate your work! How did you get into developing tools for macOS? Were you filling your own needs?

I have had a quick look at Rectangle. I'm currently using Hammerspoon, but it has problems moving windows quickly and precisely, so I wanted to see if Rectangle does better.

The main thing missing for me is being able to use mouse buttons to move windows: I have a Kensington Expert Mouse and I use buttons 3 and 4 for some actions.

Actually, the built-in keyboard shortcuts for moving spaces with Mission Control have the same problem, so I have configured Hammerspoon to turn the mouse clicks into key presses. I suppose I could do the same thing with Rectangle, tho it's annoying to have to rely on multiple apps.

You know, honestly I don't recall. From what I do remember, I had checked the repo and I believe it was something you were working on but it was going to require a really big lift. I wanted to be very charitable with you in my above comment. I used Rectangle for a decent amount of time and overall it was pretty great. I only switched because of a time/money consideration, not because of a vote of no confidence, which is not something I can always say. Keep up the great work!

Rectangle has worked well for me in the past, but recently, it's been losing a lot of windows. I often have to restart Brave to get Rectangle to be able to control it again.