Phoneboard is a free alternative to apps like ZXW, Wuxinji etc.
These paid apps cost up to a hundred bucks a year but Phoneboard is completely free.
v1.4.2 * Fixed 'F' shortcut key prevented writing in the search box. * First macOS beta release! v1.4.1 * Reworked settings dialog. * Shortcut key 'F' toggle components frame. * Antialiasing option, enabled increases rendering quality. [Enabled by default] * Croatian translation [by: Saša Valić] * Lithuanian translation [by: VeryFastSnail] * Norwegian Bokmål translation [by: Martin Refseth] * German translation [by: David Schmidt] * Russian translation [by: Олег Агекян]