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SizeUp vs Magnet: catalog facts
SizeUp	Magnet
Paid $12.99 licence with an unlimited free trial.	Paid Sold through the Mac App Store with free updates.
macOS	macOS
Half and quarter screen actions from the keyboard Moves windows between multiple displays	Drag-to-edge snapping as well as keyboard shortcuts Halves, thirds, quarters and full screen layouts
Stated compatibility ends at macOS 14 Sonoma Mac only	Mac only Only available through the Mac App Store
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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.