iPhone or iPad getting slow? Make sure you aren't too low on storage space!

My iPhone 4 had been getting rather slow lately - sluggishly opening apps or switching between apps.  Then I noticed that my storage space was really low! To check, go to Settings->General->Usage.  It will show you the overall space available and then after a minute or two, it'll show a breakdown by app, so you can see which apps are taking up the most space.

In my case, my 32GB iPhone had roughly 300MB's of free space remaining! That's very low! So I got rid of a bunch of apps that I wasn't using and I discovered one of my podcast players was keeping several gigs of old shows even though they should have already been deleted.

Now I have close to 7GB of free space and it feels like my iPhone has gotten a little bit faster and more responsive. YMMV. I know at least in the PC world, if your hard drive is nearly full, you'll run into all sorts of performance issues and other strange errors so I would imagine it's similar in iOS devices.