Is there a way to disable WiFi auto-connect on iPhone? Is there a way to disable automatically connecting to a known WiFi network on an iPhone?

Say that your work/school has a monitored WiFi network. You only want to connect to it when you plan on downloading a large file, so you don't want to connect to it automatically. But you also don't want to re-enter your credentials every time you want to connect.

Is there a way to tell your iPhone to forget an network until you want to re-connect?
At this time, there is no way to do this.  Your only options are to have it always on or always off.  

I suggest letting Apple know you want this feature by providing them feedback here.