Should I download the same apps into my iPhone 5S?

My Lenovo phone has all the different apps but I want to download messenger, twitter, snapchat onto it and my iphone has YouTube, Facebook and instagram as well as my Lenovo phone. There's instagram, Facebook, messenger, twitter, Snapchat, on my Lenovo phone too. Would it be strange to have the same apps on the two phones itself?

Yes. Its easilly downloaded

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Why would that be strange?