Be careful with ringtone apps... many of them have mandatory ads or require you give the app permission to have access to some items.
A better solution would be to go to a website that has FREE ringtones you can download. Installing them is very easy. On my phone, I first created a folder...
Just to let you know... the Conference Call and Bee Shield no longer work the way they used too. One of the updates pretty much depowers the shotgun with an Amp Shield because it was too powerful.
I understand your question. Sometimes when you download an app, it does not always put an Icon on any of your home screens.. and when it does, you never know where it will be. It's possible that a few of the apps you installed didn't leave an icon. You need to go to your App Manager button...