What is Reddit's opinion of Note Trainer (Sight Reading)?

From 3.5 billion Reddit comments

I would suggest downloading an app to practice sheet music reading. It helped me improve my speed.

This is the one I downloaded (Android), but there are many more.

You should practice with this app for iPhone or this one for android. Using it for a week and you'll solve that issue. Like playing a game. You'll be ahead in the long run since Synthesia is very limited.

Note Trainer for Android. Not sure about IPhone...

Just keep practicing you'll have it down in a week or 2. Wish I had used this app from day one. It has a stats page which shows your strength and weakness for individual notes.

I use Note Trainer