If you wish to import a set of custom waypoints in to RWY for Android, simply follow these steps:
create a spreadsheet with all the waypoints in it, saved as a .csv file. See the attached file for an example of the format needed.
Send this file to your Android device. There are many ways to do this - Email
On your Android device, select the file and choose 'Open in RWY' (NB: if your file settings do not show this option you will need to change the associations through Settings>Applications. Contact Google for assistance with this step https://support.google.com/android/?hl=en)
The file should open in RWY and prompt youth save the waypoints
RWY will also allow you to export your saved waypoints in to a CSV file. If you are getting stuck with creating your own data set, a good starting point can be to create a user waypoint in RWY, then export this to a CSV file which you can edit. Go RWY>Settings>User Waypoint Catalog>Export to file (breadcrumb icon, top right).