Mobile-first event

Definition

Mobile-first event is the design approach that starts from the mobile version of the event site and app, then expanding to desktop experience as secondary. It is the opposite of "desktop-first" (then adapted to mobile) which was the norm before 2018.

Details and formula

Observed data on B2B Italian/EU events:

• 60–75% of pre-event landing traffic comes from smartphones
• 45–55% of registrations happen from smartphones (higher on free events)
• 85%+ of event app on-site usage is from smartphones (tablet less frequent)
• 30%+ of event emails opened from mobile (device used before desktop in the morning)

Context and typical ranges

Critical design considerations for mobile-first:

• Minimum 44×44 px tap target (Apple/Google guideline)
• Forms 1 field per row on mobile (no 2-column layout)
• Fixed CTA at bottom when scrolling (sticky bottom bar)
• Contextual keyboard: email input opens email keyboard, number input opens numeric keypad
• Progressive image loading: lazy load below the fold
• Loading time <3s on 4G: controlled asset weights
• Anti-involuntary zoom: strict viewport meta

Common failure: testing only on desktop, deploying, discovering 60% of traffic has halved conversion.

How it applies in OAK EVENTS

OAK EVENTS is designed mobile-first: all landing templates, registration forms, event app, attendee dashboard are touch and mobile-keyboard optimized. Continuous testing on real devices (iOS, Android, various screen sizes) is part of the product QA process.