I have a bunch of different apps on my iPhone 7 (iOS v.12.4.1). Some of these are made by large companies such as Amazon, McDonalds, and so on. There are also some that have been made by perhaps a single developer. Some of my apps are quite well known in the Apple App Store while others, not so much (judging from very few reviews).
With this question I wanted to ask about what security risks these apps would pose on my banking sessions if I were to do my banking (using the app from my bank) on the iPhone.
For example, many of the apps (but not all) have a "Background App Refresh" toggle switch like what is shown below.
And then there is the possibility to have more than one app running simultaneously, and switch between them using the App Switcher. Like what is shown in below screen shot.
And some apps, such as a VPN app named Freedome (made by F-Secure), are apparently able to run completely in the background, without a visible UI.
So while there is some possibility for background processing, I was thinking that one app cannot have much of any effect on another (or on the banking sessions made from iPhone) because they are in some sense isolated from each other.
But in order to confirm that, here's my questions.
How much damage could some app XYZ cause on the banking sessions I do on my banks app in below cases:
- If the XYZ app has "Background App Refresh" enabled?
- If "Background App Refresh" is not enabled but I have it running while I am using my banking app?