I haven't put them on the SD card because I had trouble doing that with my s3, they just didn't work well, couldn't use widgets etc, so I haven't even tried with the LG. I've looked in my apps (installed, running, etc) in settings are they're literally gone. I've had to go back and install again... I don't think I could do that if they were hidden somewhere, right?
For whatever reason this phone deletes apps on its own.
Thank you for the ideas!