In the late 90's with dial-up connections, most ISPs would not do this, hence the search for .su proxies. Today, it is much easier when you can spin up a VM in the cloud and control DNS entries.
Back in the late 90's and early 2000's, there were a set of hacking challenges called the Zebulun Challenges hosted by the site CyberArmy. For the 7th or 8th challenge (Lt. Kernel to Kernel), you had to find a proxy or have an rDNS for your IP that resolved to a .su domain in order to proceed into the simulated system you were trying to hack into.
Walk through some IoT stuff using Stringify or ITTT. Let them help you create what is going to happen. Use the development tools on an Android device to change location to show geo-fencing triggers. Every kid there could use the "silence my phone when I get to school" routine, but you can always get more advanced than that.
Maybe I'm cynical, but this looks more like a data hording scheme than a protect my privacy enhancement. If I use Google to sign in, Google and the app has that data and can monetize it.
Now if I sign in using Apple, they are going to have the data to monetize. They may keep the app from getting my information, but that means that their data is better than someone else's data, so it is more valuable. Also, they are getting app usage statistics that I may have opted out of at the OS level, but they now have due to having the sign in history.
I actually use this one all the time. I do a little wood working and if I slice open a finger, I just grab my Rockler CA glue, put some on, squeeze the slice shut and wait about a minute.
If you purchase liquid bandage in a drug store, it is just sterile CA glue.