GateProof

GateProof is an event check-in app for iPhone, iPad, and Mac that issues guest passes and verifies them at the door without uploading the guest list anywhere. It's built for the organizer who has a private event and a list of names, and who doesn't want that list sitting in a ticketing company's database. Passes are cryptographically signed when they're created, and the scan at the door checks the signature on the device itself, so the whole entry flow works with the phone in airplane mode if it has to. That one decision, verifying locally instead of calling a server, is what the rest of the product is built around.

Setup is short. You create an event, bring in a guest list, generate passes, and send them out. Lists import from CSV, TSV, Excel, or plain text, and the app detects the columns on its own instead of making you map fields by hand. Passes go out as PDFs, images, or plain QR codes, which means guests don't install anything, don't create an account, and don't need a wallet app. Anyone who can open an email or a message can get through the door. The company puts a working event at about two minutes from a standing start, with no backend to configure and no account to set up first. Because passes are generated and signed locally, they stay valid whether or not the organizer's device is online when a guest opens theirs.

At the door, a scan returns one of three answers, valid, already used, or invalid, and the interface leans hard on making those three unmistakable to someone working fast in bad light. Scan state is tracked, so a pass that's already been used can't quietly walk in a second time. When several doors run at once, devices sync over Wi-Fi or a direct peer-to-peer connection so they share one view of who's already inside. Without that sync, two unconnected devices can each accept the same pass once, which the support documentation states outright rather than glossing over. That tradeoff is the honest cost of working offline, and the fix is simply putting the doors on the same network whenever the venue has one.

Platform coverage is Apple only. iPhone and iPad do the scanning, and the Mac can create events, manage them, and watch check-ins land live, but it can't scan, so it works as a desk console rather than a door device. Events move one way through draft, active, completed, and archived. Ownership stays with the device that created the event, so only the owner can change the core details. Cloud backup exists but it's optional and set per event, which keeps the default posture local. Recurring events aren't supported yet, so a weekly series means creating each occurrence separately.

The fit is private and corporate events rather than public ticket sales. Corporate offsites, VIP gatherings, member nights, and anything run by an organization with real confidentiality obligations, including legal, medical, and nonprofit settings where the guest list is sensitive on its own. It also suits venues where connectivity is unreliable or missing entirely, like farms, rooftops, basements, and remote sites, since nothing in the check-in flow depends on a signal being there when the doors open. Membership clubs, private dinners, and screenings fit the same shape, where the list is small enough to manage directly and sensitive enough that handing it to a third party is a real objection rather than a theoretical one.

What sets it apart is posture more than any single feature. Most check-in tools assume an account, a cloud-hosted guest list, and a live connection, and they treat privacy as a settings page. GateProof starts from the other end, where the list stays on the organizer's hardware, verification is math done on the device, and the network is a convenience for syncing rather than a dependency. That makes it narrower than a full ticketing platform, with no payment processing, no marketing tools, and no public event pages, but it handles the door well and leaves the rest alone. Anyone running a paid public event with refunds, seat maps, and marketing emails will still need a full ticketing product alongside it, and the site doesn't pretend otherwise.

Charging works through prepaid issuance credits bought in the App Store. One credit covers one issued ticket, debited when an event first goes live, and there's no subscription and no percentage taken out of ticket revenue. For an organizer selling tickets at a real price, that's a meaningfully different arrangement from platforms that take a cut per sale, and it means the cost is known before the event rather than after it. Specific credit pack prices aren't listed on the site and are pointed to the App Store at launch, so the exact numbers need checking there. The app is published by Prisma Divergente, Lda., and support runs through hello@gateproof.app. It also means there's nothing to renegotiate when a platform changes its terms, since the events, the passes, and the scan history all live on hardware the organizer already owns.