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# Mobile A/B Testing

Test mobile separately from desktop — behaviour differs too much for combined tests.

| Test | Expected Impact |
|------|----------------|
| Sticky vs non-sticky CTA | 10-30% click increase |
| Hamburger vs bottom tab nav | Audience-dependent |
| Click-to-call vs form | Measure leads, not just clicks |
| One-page vs multi-step checkout | Multi-step often wins on mobile |
| Accordion vs expanded content | Reduces scroll fatigue |

**Challenges:** Smaller segments (run longer, segment by OS not device), cross-device journeys (user ID tracking not cookies), iOS vs Android behavioural differences.
