You can save annotated PDFs to Google Drive so that others can view them when shared (with or without using Read&Write for Google Chrome)
Note: Only annotations with the Typewriter Tool will appear when saving to Google Drive
In the PDF Reader click the Print icon in the lower left on the bottom toolbar
When the Print dialogue window opens, in the Destination windows select Save as PDF
Then click the Save button
You can choose a location to save the PDF on your device.
It's recommended to save the PDF to Google Drive so you can then share it through Google Drive and others can view any annotations with or without using the Texthelp PDF Reader.