Noteshelf is a productivity app for Android from Fluid Touch, built for getting things done on a phone rather than at a desk.
Features of Noteshelf
The interface is built around quick capture: writing something down fast matters more than formatting it.
Build details
This build is version 9.0.10 Build 675, the download runs to about 254MB, and it needs Android 9.0 and up.
The change in this release is listed as Paid Patched. Check the file against the scan result on this page before you install it.
Installing
Allow installs from unknown sources for whichever browser or file manager you used, open the downloaded file, and confirm the prompt. If an older copy is present and its signature differs, uninstall that first.