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SizeUp vs Moom: catalog facts
SizeUp	Moom
Paid $12.99 licence with an unlimited free trial.	Paid $15 license valid forever with at least one year of updates, and a free trial.
macOS	macOS
Half and quarter screen actions from the keyboard Moves windows between multiple displays	Customizable pop-up palette on the window buttons Saved window layouts for different display setups
Stated compatibility ends at macOS 14 Sonoma Mac only	macOS only Paid, with upgrade fees for later major versions
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.