3 things I learned from Apple HIG:
Adjust levels automatically when necessary, but not the overall volume. Your app can adjust relative, independent volume levels to achieve a great mix of audio. However, the final output should always be governed by the system volume.
Explain the benefits of authentication and how to sign up for your service. If your app requires authentication, display a brief, friendly explanation on the login screen that describes the reasons for the requirement and its benefits. Also, remember that not everyone using your app has an account from the start. Make sure you explain how to get one, or provide a simple in-app way to sign up.
Briefly and precisely describe the operation to be undone or redone. The undo and redo alert title automatically includes a prefix of “Undo ” or “Redo ” (including the trailing space). You need to provide an additional word or two that describe what’s being undone or redone, to appear after this prefix. For example, you might create alert titles such as “Undo Name” or “Redo Address Change.”
APP Map:
Wireframes:
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3.0
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