What is Reddit's opinion of HP Prime Pro?

From 3.5 billion Reddit comments

As it is something released by HP themselves (pending you are discussing https://play.google.com/store/apps/details?id=com.hp.primecalculator&hl=en ) then I'd say it comes ready to use as soon as you buy/install it. I'm not really sure of anyone that has taken the time to buy and use that version though, so I don't have a definitive answer for you. I'll poke around and see if I can find someone with more information about it.

I have installed:

• HP Prime
• Droid48
• Emu48
• RPNCalc

Of those, I use Droid48 the most by far. Even though I own the HP Prime, and have also paid for the professional version from the Play Store, it's... frustrating.

I was only was able to find this: HP Prime Pro, and couldn't find the free version

HP Prime Graphing Calculator

https://play.google.com/store/apps/details?id=com.hp.primecalculator

The newest update seems to have broken it, though.. make of that what you will.