Sorry for posting the same thing again. I am not sure why I can't seemed to edit the old post.
I am a Sec 2 student from Singapore, and I'm pretty new here. I'm not sure whether this is the correct place to put this type of things or not, but anyway, I'll just give it a try. I have developed an app called PSLE Aggregate Calculator available on Google Play Store(Will be available for iOS after my SA2). I just updated the app to have a more pleasant layout. Google play will take a few hours to process my app. It should be available from 6 Sep onwards.
The App can estimate the aggregate score for PSLE from SA and prelim results, with accuracy depending on the information input(average score and standard deviation).
It's free , just search PSLE Aggregate Calculator, which is the app name on Google Play store. You will find it there. Should you have any questions, you can ask me here.
for your support !