The chances of iOS 9 gaining a dark mode is, to me, fairly high because of precedent. Apple already has added dark mode to iBooksand in OS X Yosemite, so it seems the natural progression would be to bring it to iOS as well.
Give the camera grid lines better contrast
My iPhone 6 is my only camera, and I love the quality of the photos it produces. The iPhone 6's 4.7-inch screen is plenty big enough as a viewfinder, but I do run into problems using the optional grid lines in the Camera app, which are too light and low-contrast to see comfortably.
I do like using the grid, as I try my best to adhere to the rule of thirds, but it's not easy, as I'm constantly shifting my eyes to find where my subject is in the grid. I also experience this issue in third-party apps like Instagram and VSCO Cam, where I'm editing photos prior to sharing. The contrast of the lines just isn't high enough for me, and it makes for processing photos a pain--often literally.
My hope is that Apple will make the grid lines thicker, which will enhance their contrast and easier for my eyes to pick up. In doing so, I think it will improve my photography skills because I'll be able to focus my subjects exactly where I want, rather than straining my eyes and approximating where it best fits.
The thread that holds my iOS 9 wish list together is contrast. To a visually impaired person, contrast can make or break an experience, and it's a big reason why so many in the accessibility community bemoan iOS's visual makeover. My hope is that some (if not all) of these ideas are announced at this year's WWDC, beacuse I feel these changes will marry what was great about the iOS 6-era UI with the modern, sophisticated look of iOS 7 and 8.
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