When comparing Hammerspoon vs AROW, the Slant community recommends Hammerspoon for most people. In the question“What is the best window manager for Mac?” Hammerspoon is ranked 10th while AROW is ranked 21st. The most important reason people chose Hammerspoon is:
Hammerspoon's Lua scripting and broad API allows you to perform any action you can imagine on your mac. It hooks into many OS APIs directly and has some high-level APIs to manipulate things like Spotify or iTunes. See the full list [here](https://www.hammerspoon.org/docs/).
Ranked in these QuestionsQuestion Ranking
Pro Deeply customizable
Hammerspoon's Lua scripting and broad API allows you to perform any action you can imagine on your mac. It hooks into many OS APIs directly and has some high-level APIs to manipulate things like Spotify or iTunes. See the full list here.
Pro Automate actions based on the operating system
Hammerspoon lets you hook into OS level events and trigger any action you can imagine. From setting up a simple keyboard shortcut to launching a complex workflow using multiple apps and scripts.
Pro Support for multiple monitors
If you use external monitors, the app is useful. It also supports retina screen without problems.
Pro Customizable options
You can customize the app in Option, for example, where you can change the appearance of the preview outline, adjust the width of the recognition areas, and set keyboard hotkeys for quick window snapping.
Pro Define OS X window buttons
AROW enables you to change the actions of OS X’s window buttons. It only requires either a right or a left-click for the action to take place.
Pro Smart Panel to move and resize windows
The customizable grid panel is very intuitive and is an accurate way to resize and move windows. Simply drag your mouse across its grid, the window will be moved, and resize to the exact position instantly.
Pro Easy ways to snap windows
Simply drag windows to the edges of your Mac’s screen. Once the cursor reaches the screen’s edge, the window will automatically move and resize to fill exactly half or quarter of the screen.
Con Some knowledge of programming required
Hammerspoon is scripted in the Lua programming language, and some familiarity with programming in general will be needed to use it. Some plugins exist that can be used by adding some files to a specific folder, but this will not give the flexibility that is so key to Hammerspoon
Con Trouble with GUI
Yosemite (10.10.5) it works but it's impossible to open the application GUI.