4096x4096px is the maximum.
But that should be just fine for google and flickr, right?
This Somewhat Helps, The main Issue is that under the description it says that the Largest megapixel acceptance is 12mp. My camera renders at 18 mp. This would be 5184x3456. What I intend to do is Take a couple of pictures with my camera (Canon T4i), Eject the Sd card(sandisk Extreme 32gb class 10), Use the SD to Lightning adapter(from apple), connect it to my ipad and transfer the images to the pictures app (the preinstalled apple one). Open the Photoshop app select an image and use one of the images from my camera in my ipad to be able to edit and upload. That is it, but if 4096x4096 is all that it accepts then My 5184x3456 image is too big and that would mean that the image will not be accepted by the app. If anything I will have to set my image quality to be lower or to shave off some of the pixels in my pictures, which I would have to use photoshop for, but going to my computer was exactly what i wanted to avoid. Thanks anyway. I guess I will still buy the app and try it out then and if it works I will let you guys know. I was also wondering if anyone had tried it before so I could have some Idea of what would happen, but I guess not so I will be the guinea Pig and try it and if the outcome is positive Get ready to see a whole new way of using your tablet. I will update the results and try to make a video about it if it works. The main test points will be If it accepts the image, and if it doesnt crash and make me lose my files while I was working on them if it crashes.Thanks Guys.
Do not worry - bigger images are accepted but will then be reduced to a limit of 4096.
The more power the iPad has the less frequent you will encounter memory issues and App crashes.
Working with maximum dimension and max layer count is always critical on those devices.
Just keep in mind to save your project often .