I have been trying to find the best process flow for handing off specs from a designer to a developer for both iOS and Android screens. For iOS, currently our designer creates the designs at 3x resolution in pixels and then gives the specs to our developers in pixels to give them an idea of how the screen should be laid out. But we have been running into issues where the screens do not look like the specs we have created.
How do you hand off specifications to your developers both for iOS? Do you use points or pixels? Do you create the screens at 1x, 2x, or 3x? How do you hand off specifications for Android?
Any advice is greatly appreciated!