← Hammerdeck

Hammerdeck, Rectangle or Moom: which Mac window tool fits

Rectangle if you want halves, thirds and drag-to-snap on a laptop or a single monitor, free. Moom if you want polished saved layouts and support back to macOS 10.13, for $15. Hammerdeck if you work across a big or several displays and want swaps, one-key undo for snaps, swaps, grids and decks, and layouts that rebuild themselves, free.

This page is written by Hammerdeck's maker, so check the claims about the other two against their own pages, linked below. Each was read on 8 October 2026.

Side by side

	Rectangle	Moom	Hammerdeck
Price	Free, open source	$15 one-time, direct or Mac App Store	Free, open source (GPL)
macOS	14 and later	10.13 and later	13 and later
Window to the next display, by key	Yes	Yes (Move to Other Display)	Yes, pointer follows
Swap everything on two displays	Not in its docs	Not in its docs	Yes
Sizes from the keyboard	Halves, thirds, fourths, sixths, eighths, ninths	A grid you set, plus custom actions	Halves; 3×3, 2×2 and 6-cell grids where two cells span a rectangle; your own saved rectangles
Drag to a screen edge to snap	Yes	Yes (Snap mode)	No (macOS 15 and later does this natively)
Saved layout applied when a display connects	Not in its docs	Yes	Yes, as a rule; capture the layout with one button
Undo	Restore: one window's previous size	Revert: one window, to before Moom touched it	One key puts back every window the last move touched: a snap, swap, grid or deck (one step)
Every window on screen at once	Tile and cascade actions	Not in its docs	Window Deck and Window Fan
Shows what ran	Not in its docs	Not in its docs	Names each action as it fires; local plain-text log
Beyond windows	No	No	Optional extras you switch on: clipboard history, command palette, break reminders and more

“Not in its docs” means we could not find it in that app's own documentation, not that it is impossible. Sources: Rectangle's README, Moom's site and custom actions help. If something here is wrong, open an issue and it will be fixed.

When Rectangle is the better pick

You use one screen, or a laptop plus one monitor, and want the standard sizes on keys with nothing else to learn. Rectangle is mature, popular and free, and it has a named key for each fraction, eighths included, where Hammerdeck has you pick cells on a grid.

When Moom is the better pick

You want saved layouts as the centre of how you work, a long-established paid app, or a Mac older than macOS 13.

When Hammerdeck is the better pick

You have an ultrawide or several displays and move windows between them all day; see moving windows between displays.
You want to swap everything on two displays in one go.
You want a snap, swap, grid or deck undone with one key: every window it moved, not just one.
You unplug a laptop daily and want the layout rebuilt when you come back; see putting windows back on reconnect.
You want to see what your automation did, and to read the code that did it.

What Hammerdeck does not do

Drag-to-snap. macOS 15 and later has it built in; on macOS 13 and 14 use the keys.
Always-on automatic tiling, where every new window is placed for you. That is a different kind of tool: look at AeroSpace or yabai.
Multi-step undo. One key undoes the most recent change, not a history.
The Mac App Store. It is a notarized download from this site, or Homebrew.

Hammerdeck is free and open source (GPL), notarized by Apple, and runs on macOS 13 and later.

Download Hammerdeck

Or brew install --cask kouxing2000/tap/hammerdeck