EventCrewOSGPS clock-in and time tracking for event staff
Event crews work at different venues, often with no time clock on the wall. Phone-based clock-in with a location check gives you a timestamped record of when each person arrived on site. This guide explains how it works and how to roll it out fairly.
How geofenced clock-in works
When a worker taps clock in, the app reads the phone's location and measures the distance to the venue's coordinates. If the worker is inside the allowed radius, the punch is accepted and stored with the time and the location. If not, the punch is refused or flagged for a coordinator to review.
The distance is usually calculated with the haversine formula, which measures distance between two points on a sphere. The EventCrewOS prototype uses it to check the worker's distance from the venue at clock-in. Pick a radius that covers the whole site, including parking, docks and backstage. Large outdoor venues need a bigger radius than a hotel ballroom.
What it fixes
- Buddy punching. One person can no longer clock in a friend who is still on the highway.
- Disputes. "I was there at 7" becomes a timestamp and a location, not one person's word against another's.
- Late visibility. Coordinators see who has not clocked in by call time, while there is still time to call a backup.
Record-keeping basics (US)
Under the Fair Labor Standards Act, employers must keep accurate records of hours worked for non-exempt employees (see 29 CFR Part 516). Federal rules allow rounding punches to the nearest 5 minutes, tenth or quarter hour, but only if the rounding is neutral over time and doesn't always favor the employer (29 CFR 785.48). Many states add their own rules on meal breaks, overtime and pay timing, so check yours. Independent-contractor crews have different rules again.
This is general information, not legal advice.
Rolling it out fairly
- Only check location at clock-in and clock-out. Don't track people all shift. Say so plainly in your onboarding.
- Have a fallback. Phones die and venues have dead zones. Let the on-site lead confirm a manual punch, and keep a note of who approved it.
- Review before payroll. Flagged punches should be approved or corrected by a person, not silently dropped.
- Show workers their hours. When crew can see their own clock-ins and earnings, there are far fewer disputes. EventCrewOS shows a live earnings counter during a shift.
Frequently asked questions
Is GPS clock-in legal for event staff?
In the US it is generally lawful to check an employee's location at clock-in on a work app, but some states have notice or consent rules for location data. Tell workers what is collected and when, and check your state's rules.
What radius should a venue geofence use?
Large enough to cover the whole site, including crew parking and docks. For a stadium or amphitheater, that can be several hundred meters. For a hotel or convention ballroom, much less. Start generous and tighten it if you see abuse.
What if a worker's phone has no signal at the venue?
Use a fallback such as a manual punch confirmed by the on-site lead, and review it before payroll. Some apps store the punch and sync it when the phone reconnects.