That is certainly confusing. The ‘Security Filters’ help article indicates at the top:
Although it uses the word “normally”, not “requires”.
I’ve attempted to use a security filter in a public app before. The system let it happen, but 30 or so days later, the app owner received a message that they needed to switch plans or get their app blocked.
Well that’s stupid. If that is the case then ya you can’t do anything to secure the data in a public app from not being possibly accessed. Definitely should remove the PRO from Publisher PRO then cause I can’t even find a feature list for the publisher plans.
@Markus_Malessa I totally agree with your statement of "empowering’ people to build apps and then offer them using the SaaS model. The cost that would have to be charged to app-users prohibit some applications ever being built, because they would be financially unviable.
Also it’s a struggle to understand the AppSheet cost structure and plan accordingly. Hopefully AppSheet will revisit their approach to charges, especially now they are operating under Google.