What is Reddit's opinion of Horn Tuning Free?

From 3.5 billion Reddit comments

I made this a few years back to get more detailed information like this: https://play.google.com/store/apps/details?id=com.horntuning.free

You can even play with interesting things like changing the tuning of the horn to pull or push in individual slides or more drastic changes like using the ascending 3rd system.

Also keep in mind my tuning app and this chart are assuming equal temperament. This is often not what you actually want.

A couple years back I made this: https://play.google.com/store/apps/details?id=com.horntuning.free