FolderSync Pro is a messaging and contacts app for Android, published by Tacit Dynamics.
Features of FolderSync Pro
Contacts sync from the device address book, so setup is mostly a matter of granting permissions.
Build details
This build is version 4.13.0 Build 2020100210, the download runs to about 63MB, and it needs Android 8.0 and up.
The change in this release is listed as Full Version. 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.
