IPhone App Development

Hi, I'm looking to create an iPhone, (and possibly an Android), app for my business. I want to have a 3 dimensional render of my product. I want to be able to touch certain parts of my product which will prompt it to display text of what the part of the product does.

How is Battery life on an iPhone 5s purchased brand new with IOS8?

I'm upgrading to a new iPhone soon, I don't care much for the look or size of the iPhone 6 so I wanted to move to a 5s. But the only thing that might make me move to the 6 is battery life. If you've purchased the phone brand new running IOS 8, can you tell me if the phone still runs good?

My iPhone 3gs screen is dim after water damage?

My phone sat outside for two days in the rain but when I found it I immediately powered it off (surprised that there was still power) and removed the SIM card dried it off and put it in rice for a week. It worked perfectly fine after that but now, about a month or two later, the screen is very dim. This happened the other day but I just reset it using the home and power button and that fixed it but now nothing will fix it. Changing the brightness doesn't affect it at all and it's almost to the point of not being usable. What caused this and is there a fix?

Can you buy an Iphone and send it to someone as a gift?

Can you buy an Iphone and send it to someone as a gift?

Added (1). I want to buy an Iphone for someone as a gift in the US since its cheaper to buy it there. How can I do that without visiting the US?

Added (2). As if, is it possible to call Apple or Apple Store from Eastern Europe to buy an Iphone in the US and have it sent to them?

Can the iphone 6 get internally damaged?

I have a case and tempered glass screen protector but i've dropped it a few times probably from the waist and chest of my body (i'm 5 8). The outside is totally fine but iim just wondering if there can be any internal damage that can occur