Most are now question about how to write Sinhala on the internet. We like to write on facebook , Intergam and etc.
Now most facebook posts are sinhala. Sinhala is our mother language so we would like to write and communicate in our native lagnuage is very good.
There are sinhala typing apps. Helakuru is the Most popular app for sihala unicode.
I personally use and recommends the Google Sinhala Typing tool . its very easy to use and understand.