When they are really the same thing, sure. But look at Apple: Mac, iMac, iPod, iPad, iPhone, Apple Watch (don't really like that one). Do you stand for one thing and one thing only and is that your app or your product -- and are you quite sure that's all you'll ever be? Works for Facebook. But if you're a product company and you've got a ton of different SKUs and require subbrands because they're in different categories, then no. That's why Procter & Gamble and other huge CPG firms have corporate names, but each of their products or product families get names like Tide.

If you expect to be acquired before you ever reach a second product/app or if your first one is going to be that successful, why confuse people? It's harder to remember 2 names than it is to remember 1.

Free free to set up a call if you'd like to explore this further.

Best of luck,
Steven