# Keep checking people in when the internet drops

> A booking system that keeps working when the venue loses internet: a local server takes over check-in and bookings, then syncs when the line returns.

Page: https://timerise.ai/features/offline-mode

A booking feature Timerise builds into custom booking systems its clients own. One fixed project price, typically $15,000 to $50,000, with this feature part of it. Last updated: 2026-10-20.

The Wi-Fi fails on the busiest day and the queue stops. We build an offline mode into your booking system: a small server at the venue takes over check-in and bookings, and syncs everything when the line returns.

What goes wrong without it:
- Festivals, ranges and field sites lose internet at the worst moment. A cloud-only system stops, and so does the door.
- Paper lists as a backup mean double entry later and mistakes nobody can trace.

How we build it, to the client's rules:
- Local server: A small computer at the venue keeps a live copy of the bookings and takes over the local network.
- Check-in without internet: Tickets and bookings are scanned and checked in against the local copy.
- Safe sync: When the line returns, everything done offline goes back to the cloud, with no duplicates.

Compared with a SaaS tool:
- Outage. In a SaaS tool: No internet, no system. In your own system: The venue keeps working on its own server.
- After. In a SaaS tool: Paper lists typed in by hand. In your own system: Offline work synced on its own.

Agent Skills that build it:
- /skills/island-mode-server

Industries that use it:
- Booking systems for events and festivals (/industries/events)
- Booking systems for gyms and fitness studios (/industries/fitness)
- Booking systems for public offices (/industries/public-sector)

FAQ:
- Q: How long can it run offline?
  A: As long as the local server has power. It holds the bookings for the day and keeps working until the internet returns.
- Q: What does this feature add to the price?
  A: It is part of the one fixed price for your system, and you see it in the quote before the build starts. Most projects cost $15,000 to $50,000 in total, paid once, with no subscription and no commission on bookings.
- Q: Can you add it to a system we already run?
  A: Yes. We build it into a new system or into the one you already run, with its own quote. When the feature has an Agent Skill, your own developers can also build it with the skill.
- Q: Who owns the code?
  A: You do. The code, the data and the documentation are handed over, and the system runs in your cloud account or on ours. Every project includes 3 years of support.

Read more:
- Timerise Offline: Island Mode for Field Operations (/blog/timerise-offline-island-mode-for-field-operations)

Often built together:
- Self-service kiosk and check-in (/features/kiosk-and-check-in)
- Tickets and events with capacity (/features/tickets-and-events)
- Rooms, desks and equipment (/features/resources)

All features: /features. Start with a free brief: /brief.