Can somebody explain this to me?

Yesterday, I read about Any.DO’s to-do list app that somehow reached 100,000 users in it’s first 24 hours on the Apple App Store. You can read about it here. Naturally, I tried to download the app, and this is what I found:

AnyDo — also a to-do list app — by an Indonesian company called OxidizePixel has the same name as the very popular Any.DO. It also has a very similar UI to the distinctly designed Clear, also a to-do list app.

What’s going on here? This is misleading and unfair. I’m surprised apple aren’t tighter on this sort of deceptiveness.