Mobile App Development
Event check-in that works when the venue Wi-Fi does not
Fairground Labs ran check-in on laptops tied to venue Wi-Fi. We built a handheld check-in app with offline badge scan, local roster, and a sync that catches up without double-admitting.
The operational problem
When Wi-Fi died, the line died. Staff wrote names on paper and reconciled later — badly.
A stuck door is the brand. Sponsors notice. Attendees tweet.
What was breaking down
- Laptops at the door
- No offline roster
- Double-entry after an outage
How Striders Tech approached it
We assumed the network would fail. The device holds the day’s roster, scans offline, and syncs with an idempotent admit record.
What we built
- Offline QR/barcode admit
- On-device roster with search
- Idempotent sync to avoid double admits
- Door-lead dashboard of rate vs remaining
Results the team can measure
- Outage no longer stops the door
- No double admit after sync catches up
- Staff use phones they already carry
Who this case study is for
Event operators who have watched a line stop because the venue sold “wifi included.”
Fairground Labs operates in events. The work is a custom system designed around their process, not a generic template with extra fields bolted on.
What changed after the system went live
no longer stops the door
after sync catches up
use phones they already carry