Starting with version 8 of Clean Text for Mac and version 4 of Clean Text for iOS, Clean Text features are available with other apps (supporting Action Extensions) installed on your Mac your iPhone or your iPad.
How to use Clean Text's Actions on the Mac
When you are in any app (for example Safari or Text Edit) and you are editing some text, select the text you want to process with Clean Text actions, then click on the small arrow that appears near the selected text and choose Clean Text.
This will open the Clean Text box where you can apply the actions available on Clean Text app directly on the text. When you have done, press the "Copy" button to copy the processed text on the general clipboard of the Mac, or press the "Replace" button, to replace the source text on the app, with the one you just processed inside the Clean Text box.
Related Solutions:
How to use Clean Text's actions on iOS
Related Links:
How to use action and share extensions on iPhone and iPad [imore.com]
How to Customize the Share Menu on macOS [howtogeek.com]