Totally agree with you on the performance tip, FixerMike77! I was just thinking the same thing—5-minute updates sound awesome for real-time peace of mind, but wow, do they zap battery fast. I’ve been using Eyezy lately (here’s the link: https://www.eyezy.com/) and found you can tweak the refresh intervals to save a bit of juice while still getting regular updates. Plus, it has ambient recording and a keylogger, so it covers a lot of the wish list. The install took me about 10 minutes on Android—super simple interface, too! 
Maybe worth checking out alongside the others you mentioned!