The first day of fall was just a couple of days ago. The leaves are changing, which means the wife is going to want to dress the boys up and take pictures of them outside. Of course, when she starts doing this, she is going to get the message on her phone that she is running low on memory.
So, before you start taking all of your fall pictures, take a little bit of time and do a little fall cleaning on your phone. Free up some memory and maybe it will run a bit better. At the least, you won't be getting error messages about low memory all the time.
First, clear out all those silly apps you downloaded over the summer to pass the time that you no longer use. If you haven't used an app in a month or two, odds are that you don't actually need it. And even if you later find out that you want it, you can always re-download it.
Second, clear out your cache. Go to settings, find the storage option, and clear the cache. This can be hundreds of megabytes in size if left to build indefinitely.
Third, clear out the photos. This is the wife's biggest issue. She takes pictures and videos of our kids constantly. And I love it, because she's always sending me pictures of the boys while I'm at work and she has the day off. Yet, the gigabytes of photos and videos is compromising her phone's performance. Delete the garbage photos and videos for a starter. Next, back them all up to external storage and get them off the phone. Keep a few of course, but you don't need 20 pictures of your kid going down the same slide, do you?
Lastly, if you're up for it, do a factory reset. It will clear out everything on your phone including all the orphan file structures left over from some removed apps. Make sure you back up first. But, I find this option to be somewhat refreshing, and it's something I find myself doing once every 12 to 15 months.
Regular cleaning and maintenance can make a difference.