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Try "7 Note with Mazec" from the Play Store.
I think, that is the app you are looking for. l am writing this with a stylus. The app is a little pricey, but worth it in my opinion.
you can take handwritten notes and convert them to written text later or as you are writing, and you can also use this app as a text input method wherever you have a text entry field: Gmail, browser, search etc.
It installs as a custom keyboard so you can easily switch between keyboard and handwriting. It also does predictions and seems to get better the longer I use it!
This is my favorite writing method if I do not have the tablet in the dock.
It gets even better if you also use Keyboard Manager. I have Keyboard Manager activate the stock Asks keyboard when the tablet is docked, Swiftkey when undocked in landscape, and 7Note with Mazec when undocked in portrait.
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