[ar15saveslives]

iOS cleans up Caches/tmp directory, it it needs space.

https://developer.apple.com/library/content/documentation/Fi...

> "Note that the system may delete the Caches/ directory to free up disk space, so your app must be able to re-create or download these files as needed."

> tmp: "however, the system may purge this directory when your app is not running."

[vinayan3]

Despite this claim. It doesn't feel like it happens. Maybe, apps aren't writing the Cache files to the right place and that's why they aren't being cleaned up.

[mwexler]

But system controlled garbage collection is great until it's not. When I need space, I need it now, not when system decides I do. We've seen it with Java, and now with iOS. Yet another thing that iOS does on my behalf that I may wish to do myself.