How to crop one photo into another?

So I've seen people crop a picture of someone onto another picture… So what's a free app for iPhone that I can use to take 2 of my photos and crop one into the other (not blending but cropping)

What app to change slide to unlock on iPhones?

So there's this 1$ app where you can customize the slide to unlock thing on the screen when you first turn it on. I forget what it's called tho. Please help. Oh yeah and an app that you can see how many times some one has looked on it Instagram profile please tell me what their called!

What's a good app to make your pics look gorgeous?

I have an iphone 5s and when i take my selfies they come out a little blurry or if not the color is off. I see people on instagram with really clear pictures does anyone know of an app that can help?

How to save up at least $100 for IPhone?

What are some simple, easy, guaranteed ways I can make money/save up money? I need to obtain $100 bucks so I can get an IPhone okay. I'm 17 years old. I've never had an easy time saving money.

Can I sell my replacement iPhone 5s?

My iPhone 5s had water damage it wouldn't turn on. I called T Mobile right away and got next day shipping on a replacement phone.

Of course I paid a fee, however the next morning I tried to turn on my phone and it has been working completely fine. I now have two iPhone 5s.

My nephew needs a phone but I'm thinking about selling the phone to someone so I can get my money back.

Is this possible? Will the phone work for my nephew? I didn't open the phone yet it's still in its box completely wrapped.

Will it reject my nephews SIM card because it isn't mine? Or should it be fine?

How much is the iPhone worth?

I'm selling a white iPhone 4 and it's cracked on the back and front I don't have a cord to give because with the new phone I got a car charger that I want to keep but I do have the charger box that plugs into the wall to give I was thinking of selling it to the buyer for $150

Why does my iphone 5c buffer?

I have full bars and full Wi-Fi. But sometimes YouTube videos will buffer, vine videos will take forever to load and some Instagram pictures won't even load. Even tho I have full bars.