All these protection companies will make you install their apps, then only you'll get the protection. What these apps do is to use your data to make more money. They spy on what you do, what you install, etc. In short, make money from customer + plus his/her data too. Only issue for them is when they have to pay when your phone gets damaged, they try their best to keep on postponing the issue & try and avoid paying you, but ultimately will have to pay (but no 100% guarantee, you could get gamed in their TnCs).
Use better protection on your phone instead like Tempered glass, back cover, etc.