It's in the app store.

I was looking for an app to resize to less than 100mb and also has a compression feature so it can be larger and still be below the 100mb. One of the things that the app 'photo resize' has is the ability to go to your photos on the iPad or phone, fix the photo and select an option that takes you to the 'photo resize' app from within the 'photos' app on the iPhone or iPad. When your done click save and it's resized with no extra steps. All you need to do next is select the photo to upload from the 'Choose File' box on this site.