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OnTopReplica vs WindowTop: catalog facts
OnTopReplica	WindowTop
Free Free; licensed under MIT.	Freemium Free to use, with advanced features in a paid Pro version.
Windows	Windows
Keeps a live copy of a selected window visible Replica window stays on top	Always-on-top pinning for any window Interactive picture-in-picture with cropping
Windows only The listed supported versions end at Windows 10	Windows only Some features require the Pro version
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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