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Tower vs Changes: catalog facts
Tower	Changes
Paid A paid subscription is required after the trial.	Free Free and open source under the MIT licence.
Windows, macOS	macOS
Undo for almost any operation, including discarded changes Quick actions and keyboard-driven workflow for heavy daily use	Native macOS interface built with SwiftUI and AppKit Open source under MIT
Subscription pricing macOS and Windows only	macOS only No GitHub releases published; installation via Homebrew cask or building from source
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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