To invert a picture on an iPhone, open the photo in the Photos app. Next, tap on the Edit button at the top of the screen. Here you’ll find various filters, as well as an option to invert the colors by tapping the inverted circle at the bottom right of the screen. If you don’t want to use a filter, you can also use the Adjust option at the same time. This will allow you to manually adjust the colors and brightness of the image. If you want to revert back to the original image, simply tap the Reset button at the top of the screen.
