ResizeCam - Custom Size Photos
This app is a camera application that allows you to customize the size of your photos.
Its completely free, and you can use all features without any cost.
You can set a custom width with a specified aspect ratio, giving you the freedom to, for example, set a custom size like a banner.
Apple TermsOfUse(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/