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todometer vs Things 3: catalog facts
todometer	Things 3
Free Free and open source.	Paid One-time purchase, priced separately for Mac, iPhone and iPad.
macOS	macOS, iOS
Progress meter as positive reinforcement Pause items without deleting them	Clean, well-regarded design Quick to learn
Deliberately minimal, no projects or due dates mentioned Installed from GitHub releases	Apple platforms only Each platform version is bought separately
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account 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 2, 2026	Official website Full listing and sources Checked September 23, 2026

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