There aren't many iPhone apps that let you change their color theme beyond light and dark appearances. They really don't need to either because iOS has a few hidden tricks up its sleeves to help you customize any app's colors either during a specific session or every time you use the app. For example, if you're tired of the dark theme that Apple's stock Calculator app has sported since iOS 11, which is pretty much the same color scheme used since its inception, give it a new look. Instead of black and orange, you can go with white and blue. If you don't like the orange buttons, you can set... more
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