Setting aside this embarrassing directly-copied-layout issue, I have to say the concept itself is very nice. Is it original idea or is it also cloned from other

Setting aside this embarrassing directly-copied-layout issue, I have to say the concept itself is very nice. Is it original idea or is it also cloned from other app? If former is true, that's a pity the author shoot himself in the knee. If the latter is true, could you point me to other, original app(s)?