Quoting from the Additional Guidance section:
If bugs are significant enough to change your answer according to the Accessibility Nutrition Labels evaluation criteria, then don’t indicate support for the accessibility feature. To avoid misleading users, you shouldn’t enter answers that aren’t aligned with the evaluation criteria.
Ultimately each app owner is responsible for determining what their core, common tasks are, and whether their app is in line with the criteria for each label.
Whether a particular bug prevents the user from completing a common task is subjective depending on the skill of the user, but some common sense applications apply. For example, if a missing label on a Delete button causes a permanent, destructive action, it's obviously more serious than a missing label on a non-desctructive menu. Likewise, a single contrast failure at a 4.49:1 luminosity ratio (just below the minimum recommended threshold) will not be as impactful to the user as a more extreme, or more pervasive, problem in the app.
Also from the end of the Tips section:
You may consider exceptions to the recommendations here if users with disabilities would find them reasonable. For example, you might hide a button from VoiceOver in one view if it duplicates functionality that’s already available and discoverable elsewhere.
If you aren't sure about whether the example missing label or contrast issue prevents a user from successfully completing a task, consider hiring users with various disabilities either as full-time employees, or as contracted part-time participants in your regular TestFlight evaluation.
The closing guidance on each criteria page may be helpful with your evaluation, too:
Even after you’re able to indicate support for [accessibility feature] in the common tasks of your app, there are likely further improvements you’ll be able to make to the accessibility of your app. Re-evaluate your app's support for [accessibility feature] every time you update your app. Set a goal to make your app more accessible to more people in every release.
I'm hopeful it's clear that acknowledges 100% perfection is not achievable, and therefore not expected. However, "if bugs are significant enough to change your answer according to the Accessibility Nutrition Labels evaluation criteria, then don’t indicate support for the accessibility feature."
Good luck!
Topic:
Accessibility & Inclusion
SubTopic:
General
Tags: