The problem
A shared event registration spreadsheet works until two people edit it at once. Staff confirm a waitlisted attendee while someone else cancels a different row. Formulas get overwritten. The form responses tab, the manual status column, and the check-in list drift apart. At the door, you search a printed list that is two hours old.
Status gets fuzzy. Pending, confirmed, paid, waitlisted, cancelled, and checked in all live as colored cells. Color is not a state. A cell can be green and blank. Payment is a note in a column or an email in someone's inbox. Dietary and accessibility notes sit in a column everyone can see, including volunteers who only need names.
Event-specific copies make it worse. Each new event starts from last year's file with stale formulas and old rows. You cannot tell who changed a guest from confirmed to cancelled, or when. Finance exports a filtered view and hides columns by accident. The spreadsheet is doing three jobs: registration form, attendee database, and door list. Each job needs different rules.
What a good solution looks like
A good app starts with a public registration form that writes to a real database. Keep one record per attendee, linked to an event. Store name, email, ticket type, status, payment status, consent, accessibility needs, checked_in_at, checked_in_by, created_at, and updated_at. A unique index on event and lowercased email stops duplicate registrations. If one person registers a group, use an order record with attendee records under it. Validate email and required fields on the server, not only in the browser.
Status should be controlled, not typed. Use a small set: pending, confirmed, waitlisted, cancelled, checked_in. Allow only sensible transitions, such as waitlisted to confirmed and confirmed to cancelled. Run the capacity check inside a transaction with a row lock on the ticket type. When a seat opens, offer it to the next waitlisted person by created_at and give them a clear expiry. Put payment status in its own field so a paid guest is not confused with a confirmed guest.
Staff need a search screen, filters, bulk actions, and an audit trail. The check-in screen should have a large search box, QR scan, and an undo button. Badge printing pulls name, ticket type, and company if you collect it. Keep dietary and access notes off the badge. Use roles: registration desk sees contact and check-in, finance sees payment fields, and admins manage the event. Every change records the actor, timestamp, old value, and new value.
How to build it
Pick your next event and map every column in the current file to a field and an owner. Mark which fields staff can edit and which come from the form. Write down capacity rules per ticket type and the waitlist order. Find duplicates with lowercased email and decide a merge rule before import. Build the import first, because a clean attendee list is the core of the app.
Build in slices. First come import, list, search, and edit with audit. Then the public form and confirmation email with an .ics file. Next comes capacity and waitlist promotion inside a transaction. Last is check-in and badge export. Use your identity provider for staff sign-in. No shared password. Add rate limiting and bot protection to the public form. Store timestamps in UTC and display them in the event timezone.
Test the ugly cases. Open two browsers and try to take the last seat. Cancel a confirmed guest and watch the waitlist offer go out. Let an offer expire. Try a duplicate email. Export a file with commas and line breaks in notes. Pull the network cable at the door and check that the offline list still works. Print a backup attendee list at the start of the event.
Roll out with one source of truth. Import current registrations, check the counts, and freeze the spreadsheet as read-only. Train the registration desk and finance on their own screens, then write a short runbook for event day and closeout. Do not run both systems for the same event for long. Two systems create two answers and duplicate work.
Risks and how to manage them
Duplicates and overselling are the first risks. A double-clicked form or a staff manual add can create two records. Use a unique constraint and an idempotency key on form submissions. Capacity checks belong in a transaction, not in a formula. Waitlist promotion needs the same lock so two staff cannot confirm two people for one seat.
Privacy needs design. Collect only what the event needs. Put accessibility and dietary notes behind a role, not in the general attendee list. Keep them off badges and out of broad exports. Set a retention rule for after the event and remove staff access when the event closes. The audit log should be append-only so edits remain visible.
Payment reconciliation can drift. Let staff mark payment status with a note, or connect a payment webhook if you have one. Build a closeout report that lists confirmed guests without payment and payments without a matching registration. Do not delete cancelled records. Keep them for history and refunds.
Door failures are common. Wi-Fi drops, a laptop dies, or someone opens an old link. Download the check-in list before doors open and queue check-ins offline with timestamps. Use one short URL for staff and redirect old links. Back up the database daily during registration. Test email delivery, because a confirmation that lands in spam becomes a support ticket.
How to measure success
Measure before and after. In the last spreadsheet event, note how long a waitlist promotion takes, how many duplicate rows you find at import, how long one check-in takes, and how many payment mismatches finance finds at close. Use those numbers as your baseline. After the app runs for one event, compare the same numbers.
Track app behavior too. Count registrations that needed no staff edit, waitlist offers that expire, check-ins done by scan versus search, and badges reprinted. Review support emails and the audit log for patterns. If staff keep asking an admin to change a status, the role or screen is wrong.
Close the loop with the door lead and finance. Ask what slowed them down and fix one thing before the next event. A small app earns trust when the boring cases work: a refund, a guest who changes their email, a walk-in at the door. If you want a fixed scope, Cloudverg's Internal tool sprint at $16,500 is one option among others. It runs four weeks and covers one workflow, sign-in with your identity provider, roles, change history, data import, CSV exports, and a training session with a runbook.
Frequently asked questions
How do I stop duplicate event registrations?
Put a unique index on the event and a normalized email, then make the form submission idempotent. Staff manual adds need the same check. If you allow group registrations, store one order with several attendee records and enforce the unique rule per attendee.
Can I keep using Google Sheets for event registration?
You can for a very small event with one editor and no waitlist. Once two people edit, capacity matters, or you need a door list and payment status, the sheet becomes a source of errors. Use it as an archive after import, not as the live system.
What should an event check-in app include?
A fast search by name or email, QR scan, an undo action, and an offline list for door problems. It should show only the fields the desk needs and record who checked each guest in. Badge printing should leave private notes out.