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Rectangle Pro vs Loop: catalog facts
Rectangle Pro	Loop
Paid One-time purchase after a free 10-day trial.	Free Free and open source, with optional donations.
macOS	macOS
Window throws to 16 positions with one key combination Custom sizes, positions and snap targets	Radial menu for picking window positions quickly Keyboard shortcuts as well as mouse-driven selection
macOS only Paid, unlike the free Rectangle	Requires macOS 13 or later macOS only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.