If the design wasn't so similar you wouldn't even notice it's a "rip off".
Plus, your value is not the app, it's the people in the network, so stay calm and let us not-so-cool people use the open-source clone.
Plus, your value is not the app, it's the people in the network, so stay calm and let us not-so-cool people use the open-source clone.
In fact, you could assume the opposite: that, because he is a professional designer, it took him less time to design the app than it would've taken a "layman". (I'm not forgetting about the perfectionism of many designers, mind you)