Mobile App Design Case Studies & Practical Application 3 — Questions and Answers
Question 1: A social media app wants to increase daily active users. A/B testing shows a red notification badge increases opens by 22% but also increases reported anxiety. How should the design team proceed?
- Explore alternative notification designs that drive engagement without increasing user anxiety (Correct answer)
- Keep the red badge because the metric improvement justifies the design
- Remove all notifications to eliminate anxiety
- Ask the engineering team to decide
Correct answer: Explore alternative notification designs that drive engagement without increasing user anxiety
Responsible design weighs engagement metrics against user wellbeing, requiring exploration of alternatives that serve both goals.
Question 2: Airbnb's app uses large, full-bleed photography prominently. From a UX strategy perspective, this decision primarily serves to:
- Build emotional desire and confidence in accommodations before booking (Correct answer)
- Reduce page load time by using fewer UI elements
- Improve accessibility for low-literacy users
- Comply with App Store screenshot requirements
Correct answer: Build emotional desire and confidence in accommodations before booking
High-quality imagery creates emotional resonance and reduces booking uncertainty by helping users visualize the experience.
Question 3: A fitness app case study shows users who set a goal during onboarding have 3x better 30-day retention. The design implication is to:
- Make goal-setting a core, guided step in onboarding (Correct answer)
- Add goal-setting as an optional profile setting buried in preferences
- Prompt users to set goals only after 7 days of use
- Show a generic default goal to all users
Correct answer: Make goal-setting a core, guided step in onboarding
If goal-setting drives retention, surfacing it prominently during onboarding converts a high-value behavior into a standard user path.
Question 4: A ride-sharing app displays surge pricing with a multiplier (e.g., '2.1x'). User research shows most users don't understand what this means. The best redesign is:
- Show the actual estimated fare increase in dollars instead of a multiplier (Correct answer)
- Add a tooltip explaining what 2.1x means
- Hide surge pricing until after the user books
- Use a color-coded surge meter only
Correct answer: Show the actual estimated fare increase in dollars instead of a multiplier
Showing the concrete dollar impact of surge pricing (e.g., '+$4.50') communicates the real cost in terms users understand intuitively.
Question 5: During a design sprint for a meditation app, the team must validate an assumption that users want guided sessions under 5 minutes. The fastest validation method is:
- Create a clickable prototype with a 5-minute session and test with 5 users (Correct answer)
- Launch a full feature to all users and measure session completion
- Survey 1,000 users about their preferred session length
- Review competitor apps to see if they offer short sessions
Correct answer: Create a clickable prototype with a 5-minute session and test with 5 users
A low-fidelity clickable prototype tested with a small group quickly reveals whether the concept resonates before any real development investment.
Question 6: A news app case study reveals that users who use the 'Save for Later' feature have 4x higher subscription conversion. The design team should:
- Increase the visibility and discoverability of the Save feature throughout the app (Correct answer)
- Remove the feature to simplify the UI
- Gate the feature behind a subscription paywall immediately
- Only show the feature to users who have been active for 30 days
Correct answer: Increase the visibility and discoverability of the Save feature throughout the app
Features correlated with conversion should be made more discoverable so more users encounter them earlier in their journey.
Question 7: An app redesign reduced the number of steps to complete the main task from 7 to 4. However, post-launch data shows task completion rate dropped. The most likely cause is:
- The redesign removed familiar cues that users depended on to navigate the task (Correct answer)
- The app server became slower after the launch
- Users prefer more steps because it feels more thorough
- The analytics tracking was implemented incorrectly
Correct answer: The redesign removed familiar cues that users depended on to navigate the task
Removing steps can break established mental models; users may have relied on familiar checkpoints to build confidence during the task.
Mobile App Design Case Studies & Practical Application 3
A social media app wants to increase daily active users.
A/B testing shows a red notification badge increases opens by 22% but also increases reported anxiety.
How should the design team proceed?