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SideNotes vs Stickies: catalog facts
SideNotes	Stickies
Paid Commercial Mac app from Apptorium; check the developer's site for current pricing.	Free Free to download from Zhorn Software.
macOS	Windows
Notes panel appears at the screen edge without app switching Markdown, tasks, images and colors in notes	Notes persist on screen through reboots Reminders, recurring wake-ups and alarms
Mac only Suited to quick notes rather than a large knowledge base	Windows only Deliberately simple, without rich organisation features
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
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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