Compare software

Space vs Essentialist: catalog facts
Space	Essentialist
Freemium Core study features are free; Pro adds unlimited AI features.	Free Free and open source under the MIT license.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android
Uses FSRS-6 to schedule reviews Imports Anki decks and common spreadsheet formats	Flashcard decks are plain Markdown files Keeps data on the device without network access
Unlimited AI features require Pro	Does not support images in cards No built-in sync service
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: MIT
Not stated if an account is needed	No account 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 October 8, 2026

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