Accessibility means an app works for everyone, including people who cannot see well, cannot hear, or find small targets hard to tap. Screen readers read the screen aloud, so every icon needs a text label. Text should be big enough — in this course at least 16 px — and able to grow. Videos need captions. Never use colour as the only clue: add a tick or a word. Avoid sudden loud sounds and fast-flashing lights.
Design for everyone — “big text, labels, captions and contrast help every user”
Our rule: text is at least 16 px; every icon has a text label for screen readers.
Add captions to videos; never use colour as the only clue.
Big touch targets and strong contrast help everyone.
Use it for: Checking your designs before sharing them and making school apps everyone can use.
Worked example: ♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
Title: 16 px
Menu: 16 px
Footer: 18 px
Caption: 11 px → 1
16 px is allowed (at least 16), and 18 is fine too.
Only the Caption (11 px) is under 16.
Check: Making the Caption 16 px fixes the screen ✓
Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
🏁 Lesson 13 test
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the
♿ Inclusive App Builder badge when you pass — and a certificate when you finish all 8 lessons of
Part 2 · Designing Apps. You can still take the test without signing in.
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