Apps all have backdoors and you agree to the 25 pages of legalese when you install.
Only an idiot signs up for this.
Always turn off background processing and location service access for all apps. If needing location for an app, set it to prompt each time or only asses location while using the app.
These are easy to find and change in your phone’s Settings area.
I’m turning into Gibbs and going to get a flip phone!