The agency has to write the feature spec itself
Getting even a quote often requires translating the needed screens and features into developer language first, spending planning time on a spec instead.

We design confirmation steps to reduce duplicate input and incorrect entry handling. Event-day developer support is scoped by task and time. Only your agency's name reaches the client; zzzarit works behind you, white-label.
“It cost about the same as bringing in part-time staff, but there were no errors, so we'll work together again.” — Event agency director, Kakao Pay Unboxing Day 2026. The cost comparison is this director's perception of that event, not a current or reference price.
Our co-founders started here: one ran a video production company and an event agency, then led a mid-size agency's digital-transformation team. We understand what agencies need in an agency's own language. Meet the team
QR input, headcount checks, entry confirmation and notification sending need different checks. These published cases show input guards, history checks and correction steps. Required rules, operator training and support are scoped for each event.
Common on-site mistake: Staff search the list by name and the entrance line backs up
On a zzzarit floor: One QR scan shows the team and its registered headcount.
Common on-site mistake: The next person's QR is scanned while the previous team is still being processed
On a zzzarit floor: No new QR is accepted mid-process. The next team comes only after completion or an explicit back step.
Common on-site mistake: Someone who already entered is admitted again
On a zzzarit floor: An already checked-in QR shows who entered and when, and stops there.
Common on-site mistake: A miscount leaves the list and the real headcount out of sync
On a zzzarit floor: Staff must confirm the headcount before moving on, and any change keeps the before and after numbers.
Common on-site mistake: Another team's badge is handed out by mistake
On a zzzarit floor: A badge already linked to another team shows which team it belongs to and is not linked again. Each team has one badge.
Common on-site mistake: Staff aren't sure the called team is the right one
On a zzzarit floor: Tapping the badge shows the team and its booking, and entry is recorded only after staff confirm it.
Common on-site mistake: Entry is pressed by mistake and there's no way back
On a zzzarit floor: Staff can correct it through a confirmation step, and the device and time of the correction are recorded.
Common on-site mistake: The same person gets the same notice twice
On a zzzarit floor: One phone number is one entry however many times it is submitted, and unconfirmed sends are never resent automatically.
Common on-site mistake: The connection drops briefly and staff assume it went through
On a zzzarit floor: The check-in desk does not show completion until the save is confirmed, and blocks new input while it guides staff to check the result.
These are confirmation steps used in the cases below, not a guarantee of error-free or uninterrupted operation at every event.
Each row describes behaviour used at Kakao Pay Unboxing Day 2026 (check-in, booking, PDA) and Woori MomoCon 2026 (mobile waiting and KakaoTalk notifications).
Getting even a quote often requires translating the needed screens and features into developer language first, spending planning time on a spec instead.
There is rarely time to prepare the technical section of a proposal or a working demo, so it often waits until right before the pitch.
Whatever caused a check-in delay or a system error, the client asks the agency first. Someone needs to respond on site immediately.
A subcontractor's name or logo appearing on screens, emails, or on-site signage can make it look like the agency didn't build it.
zzzarit isn't a general web agency — we build all nine event systems ourselves, from registration and check-in to NFC, kiosks, and booth lead capture, working behind your agency, not in front of it.
Give us the event brief and the client's requirements, and we turn them into the feature spec and screen flow a developer needs, feeding straight into a quote.
Only your agency's name appears on the screens, emails, and on-site materials the client and attendees see. zzzarit never contacts or pitches a client it met through your agency.
Before the account is won, we provide the technical slides and demo links your proposal needs, at no cost, regardless of the outcome.
Send an inquiry and receive a draft quote by email the same day, so a development quote is never the thing holding up your proposal.
Camera-equipped touch kiosks, instant printers, check-in QR readers, and on-site PDAs are already on hand, so setups come together fast on your timeline.
On event day, a zzzarit developer is on site and edits copy and operating tools directly, in the moment.
Only cases where the client and event name are already public are listed here. Which agency we worked with stays confidential, as agreed. After an event where zzzarit handled the technology, the client has come back to the same agency.
37 locations · 3 developers on siteQR check-in, a team-representative NFC badge, guidance across 37 locations, booking and PDA calls for 11 programs, and a 10th-floor quiz kiosk — all built by zzzarit.
→
Live edits on siteThree zzzarit developers on site edited attendee-facing copy, a capacity control tool, and a shared operations dashboard in real time.
→
3,000 seated · zero queueMobile waiting and KakaoTalk notification calls seated 3,000 people for the second-half concert, with everyone but no-shows seated and no queue outside the theatre.
→Tell us the systems you need, the timeline, and whether a pitch is involved. Anything undecided can stay TBD.
We send a draft scope and quote by email the same day we see your inquiry.
If you're still pitching, we provide the technical slides and demo links your proposal needs, free of charge.
Once the account is won, we build under white-label and a developer joins you on site on event day.
Written for agencies, without developer jargon, from what happens on the floor and in front of the client.
Korean-language guide: an answer agencies can give when a client asks whether the system can handle a rush.
→Korean-language guide: what stops, what stays protected, and who does what on site.
→Korean-language guide: repeated check-in, entry, and notification mistakes and how a zzzarit floor handles them.
→Choose only the scope you need. Each service page states what's included and what's separate.
Discuss running lanes, game scores and result delivery. Share a rental supplier contact and we handle technical coordination before confirming the build scope.
Custom build consultation →A close pitch deadline is fine. Send an inquiry and a quote plus the materials you need arrive the same day.