01
She can't answer the phone
Réka spends the day in attics, cellars and stairwells. About 40% of calls go unanswered, and buyers call the next advisor.
ABOUT THIS DEMO
FOR THE LOVABLE × CONTRA JUDGES
“Can you check this flat before I sign on Friday?”
Plumbline turns that message into a confirmed, access-checked, route-friendly visit, with a follow-up call offered automatically. A solo advisor never has to climb down from the attic to answer the phone.
The business, Réka and every customer are fictional. The services and prices are modelled on a real Budapest technical-advisory practice.
01 · THE PROBLEM · RÉKA'S DAY
02
Every buyer has a deadline
Usually 5–8 days between a verbal agreement and the deposit contract. Advice after that is worthless.
03
Travel eats the day
Pest to the Buda hills takes 60–90 minutes in traffic. Random bookings make zig-zag days.
04
Locked doors are the real no-show
The seller or agent doesn't open up. About 1 in 6 on-site bookings ends as a wasted half-day.
05
Many buyers are abroad
They message in English or German over WhatsApp at midnight and often can't attend in person.
06
The follow-up call is never offered
Co-buyers who weren't there rarely book one, because Réka is too busy to suggest it.
02 · BEFORE → AFTER
Inquiry to confirmed booking
~2 days
~2 min
Owner admin per booking
~25 min
~0 min
Wasted trips from access failures
1 in 6
Caught 24 h ahead
Follow-up call offered
Rarely
Every visit
| BEFORE | AFTER |
|---|---|
| Phone tag and WhatsApp back-and-forth; 1–2 days to confirm | The buyer books in about 2 minutes and is confirmed instantly |
| The deadline comes up only on the phone | Booking asks for the deposit-signing date and shows only times before it |
| Routes planned in her head; travel fee by hand | Travel-aware times cluster nearby visits; the fee comes from the address |
| Access checked by a call the day before, often forgotten | The agent gets a confirm-access link; the buyer is warned a day early |
| Reminders by hand, if at all | Automatic confirmation and reminders to buyer and agent |
| Rescheduling means more phone calls | Self-service reschedule and cancel; the freed slot reopens |
| Follow-up call rarely offered | Offered automatically after every visit, booked in one tap |
| Missed calls and messages lost | The inbox assistant replies in the buyer's language within minutes |
03 · WHAT TO TRY · 3 MIN
- 1Book a visit as a buyerEnter a deadline and see only the times before it, with the travel fee calculated.
- 2Paste a message into the Owner inboxAny language. The assistant extracts the details, finds 3 times and drafts the reply.
- 3Time-travel to the day before the visitDemo bar → Time travel. Reminders and access alerts fire on the Automations timeline.
“View as” in the demo bar switches between buyer, listing agent and owner. Reset puts everything back.
04 · HOW IT WAS BUILT
- BUILD
- Lovable project, with Claude Code working locally and syncing through GitHub.
- BOOKING ENGINE
- Slot rules, Budapest time zone handling, cancellation window and private-link tokens reused from a real advisory practice — 90+ unit tests.
- BACKEND
- Lovable Cloud (Supabase). Every visitor is signed in invisibly as a guest and gets a private sandbox with sample data, isolated by row-level security.
- AI
- Lovable AI reads the message and drafts the reply. Times, travel and prices always come from the tested engine, never from the model. 20 AI calls per visitor per day.
- TRAVEL
- A district-zone table, no maps API.
- SIMULATED
- Email, SMS and WhatsApp delivery, payments, calendar sync and the video-call link. Everything a message would say is shown on the Automations timeline.