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Squirrel vs McBopomofo: catalog facts
Squirrel	McBopomofo
Free Free and open source, with optional donations to the developer.	Free Free and open source under the MIT License.
macOS	macOS, Linux, Web
Many Chinese input schemes, from Pinyin to Cangjie and Jyutping Custom input schemes can be written and shared	Supports six keyboard layouts User-editable dictionary
Configuration is done through text files and takes some learning Documentation is mainly in Chinese	Traditional Chinese Bopomofo input only Website and documentation are in Chinese
Downloadable app	Downloadable app, Web application
Open source	Open source
License not stated	License: MIT
No account needed	No account needed
Works offline	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.