Good photo edit/photoshopping apps?

Does anyone know any good photo editing apps for iPhone?
I know this girl at my school takes a lot of selfies and some are cute. There's one that I want to do to my pictures where it was a pic of her with birds flying (it was like a watermark) in the background but it was really cute. Does anyone know an app where I can do something like that or just an app that i can use to edit my pictures? It has to be Free only

An app to keep private pictures private on the iPhone 5?

SO. Gonna be honest, I have some pictures on my phone that were sent to me by my significant other and are for my eyes only, ya know? However, there's no way to take these photos out of my general photo stream/camera roll on an iPhone 5. I can copy them into an album, but there's no way for me to remove them from the camera roll. And besides that, they are not exactly extra secure in the album anyway. I like to show people pictures on my phone without being worried I'm gonna show them the wrong pics, and it is very important to me to keep these things separate and private. And also I'd like to keep it on my phone. It is also not preferable to have it accessible online anywhere.

ANYWAY, is there an app where I can keep my photos separate from the camera roll on my phone, preferably with a pass code lock? A good app would be much appreciated.

What's up with my data in iTunes?

When I want to sync my iPhone 4S (8GB), it tells me I'm over capacity by nearly 260MB. I want to ONLY sync music from my computer; no photos, videos, apps, or anything else. However, I know that iTunes already tallies up that particular data that is already on my phone. Therefore, I have (checked on my computer and already on my phone) 212 songs (1.40GB), 16 apps (1.44GB), 1.68 GB of Documents and Data. And 220MB of "Other" all ready to sync. The problem is it says I have 84 photos (1.60GB), when I'm syncing 0 photos from my computer and I only have 42 photos and 4 videos on my phone.

*Update: As I wrote this, my iPhone synced and I suppose it unchecked or changed a few things to sync successfully. I now says I have 192 songs (1.36 GB), 42 photos (1.57GB), 15 apps (1.41GB), 1.68GB of Documents and Data, 55.3MB of "Other" that is synced or ready to sync.

So I have a few questions:
1. What is "Other"
2. What is "Documents and Data"
3. What's up with my photo data during that sync I mentioned above?
4. What's up with that "Other" data during that sync?
5. Does this seem like a normal amount of data that only 42 photos can take up?
6. How did I lose 28 songs during the sync?
7. I've gone through and deleted all unnecessary photos, videos, files, apps, etc. That I didn't want or need. So what's on my phone now is essentially what I need, but it takes up So much data. Is this normal?
8. Either way, what can I do to free up more space?

Added (1). And I forgot to mention in the update that after that unexpected sync, I ended up with only 2.1MB of free space.

Upgrading my 3GS to Iphone 5s?

I was going to upgrade my 3GS from AT&T to the 5s but I don't have an upgrade to do so. I'm planning on adding a line to my plan and was wondering if when I were to add a line, if it were to either come with an upgrade or if it were possible to receive the 5s for the price of a new contract price?

Can i use my apple earpods with my PS4?

Okay a friend of mine gave me his apple earpods that came with his iphone 5, they are good ear buds and plugged them into my PS4 controller and it sounded great, the ear buds have a build in speaker and i recorded a message and played it back i could here my voice but there was a long beep while speaking, is there any way i can use it as my headset, the one that came with the PS4 works but the ear bud is so damn uncomfortable.

My iphone was stolen and I have photos of myself on it?

Ok, so my iphone was stolen and i have a password on it but I'm worried if they connect it to itunes they can see my photos and things on it? I don't want them to know who i'm. Is there a way I can stop them from using my phone on itunes? And will they see the photos if they connect it to itunes?

Added (1). and my icloud doesn't work and i didn't have the find my iphone app. I don't really care about the phone i just don't want them to see photos of me!

I don't have internet access after I reset my modem?

I bought a new game in steam and when downloading it I realised that the download speed was slower than usual looked up on the internet how to make its speed faster and I read that if you unplug everything from your modem which I did a while ago because I went on holidays and plug everything back in you should reset your modem so I did I tried the download again but I can't access my internet on my computer (windows 7 hp) it says I'm connected to the internet but don't have internet access and I can't access the internet in my computer laptop iphone iPad or anything so does anyone know how I could fix this problem