Thanks for the helpful tips.
Adam Miller: I tried getting close to the subject. Even though the background blurs, but that blur is minimal. I was wondering if I could smoothly blur the background as it happens when using 200mm zoom at f/5.6.
Aj Sharma: Thanks for sharing this wonderful app. I’ve downloaded it and its fun playing around with it. In fact I am able to get the exact amount of blur I want. But I was thinking if I could control it while shooting itself.
YogiMaini: I’ve Sony Xperia Ray. Even though the specs say that it features Touch focus, I am not able to figure out how it works. But I have noticed one thing in my photos that sometimes accidentally I am able to get blurred background, but I am not able to figure out how it works.
I think for now I will go with After Focus app.