Help! Pooldash or Pool Doctor

Could someone please explain what is the difference between the Pooldash and Pool Doctor apps ?

I believe both are made by Gazzini Ventures but can’t find anywhere on what is the purpose of each of the apps ? Presumably one is old and one is new but I don’t want to buy the wrong one from the App Store.

Thank you!

It has been 7 days and nobody from support has replied to my post.

We are beginning to think apps are no longer supported or maintained. If anyone is out there please confirm or should we look elsewhere for another app?