Deleting apps in tWhen deleting apps from the app switcher, you're thinking that it saves battery but it actually doesn't. Think of the multitasking bar as a task switcher. When these apps are open they are using the battery life because they are being ran by the CPU but when they are closed but in the app switcher, they have been cached which means they are running but not running on the cpu, they are being kept alive by the ram.
Apple was very clever in the creation of the app switcher. App developers could decide either letting the app run in the background and doing background processes. These apps were set by default to being cached so when you closed them, they weren't running in the background. Take apps like spotify, these were programmed in a way so when you closed the app from view, they'd still continue playing the song it was on.
Cached is saving the state it was at so it could easily be opened at that state when you decided to reopen.
So deleting apps from the task switcher doesn't save battery unless these apps have been specifically programmed to run in the background.
This blog came from the inspiration of a video that I saw about 6 months when this guy demonstrated that apps that were in the app switcher used ram and no cpu power so that the myth of deleting apps to save battery is false.
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