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Mosaic vs Rectangle Pro: catalog facts
Mosaic	Rectangle Pro
Paid From £14.99, with a free 7-day trial.	Paid One-time purchase after a free 10-day trial.
macOS	macOS
Drag-and-drop layout panel Custom layouts with gutters and groups	Window throws to 16 positions with one key combination Custom sizes, positions and snap targets
Paid after a 7-day trial macOS only	macOS only Paid, unlike the free Rectangle
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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.