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Cardhop vs Merkuro: catalog facts
Cardhop	Merkuro
Freemium Free to start, with paid features from Flexibits.	Free Free and open source under the GPL-3.0-or-later licence.
macOS, iOS	Linux
Natural language input for adding and editing contacts Quick access from the menu bar	Supports Nextcloud, Google Calendar, Outlook and CalDAV calendars Combines events, tasks and contacts in one app
Apple platforms only Full features require payment	Linux only Fits best within the KDE Plasma desktop
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
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 October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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