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