The AI concierge, booking and marketing systems running World Spa.
Built and operated by Simple4u.

World Spa is a 50,000 sq ft wellness destination in Brooklyn. We built the site, the apps, the AI concierge, the booking and payments integration, and the SEO and GEO work, and we still run all of it today, alongside the spa's own marketer.

~40
AI concierge chats / day
Live since June 2026. Answers guest questions; bookings and complaints go to the spa’s phone line.
~130K
Site visits / mo
All channels, measured in World Spa's own GA4, 28 days to Sep 25, 2026.
3 yrs
Client since 2023
Same team, continuous engagement, running alongside the spa's own marketer.
2.3x
Organic clicks, rebuilt room pages
After the room pages were rewritten for search and AI assistants.
The business

A 50,000 sq ft destination that needed its digital side to match.

World Spa is a wellness destination in Brooklyn: pools, saunas, treatments, a full calendar of guests every day. Since 2023 we've been the team building and running the systems underneath the front desk and the marketing.

The base

A site and an app built for a destination this size.

We built and maintain the WordPress site, plus the iOS app, with Android on the way, so guests can browse services and book from their phone.

The systems

Booking, payments and an AI concierge running underneath.

Booking runs through the spa's own PMS with Adyen wired in for payments. An AI concierge answers guest questions and takes booking requests, live since June 2026. A marketing analyst agent reads the numbers weekly, alongside the spa's own marketer.

  • AI concierge, about 40 guest questions a day
  • Booking and payments through Adyen
  • Marketing analyst agent reading GA4 and Search Console
What we build

Six systems, running under the same team since 2023.

Each system was added when World Spa needed it. Together they cover the site, the apps, the front line with guests, the money, the marketing, and the search presence.

Foundation

WordPress site

The main site: services, pricing, booking entry points, built and maintained since 2023 in the spa's own voice.

The front door for a 50,000 sq ft destination.

Mobile

iOS app, Android next

A native app so returning guests can browse services and book without going through the browser. Open it on the App Store.

Booking is a few taps away for regulars.

Customer service

AI concierge

Works from the spa's own pages and policies. Answers guest questions around the clock and sends what it can't handle to the spa’s phone line. Live since June 2026.

About 40 guest questions a day.

Commerce

Booking and payments

Booking runs through the spa's own PMS, with Adyen wired in for payments. Built server-side so checkout stays on World Spa's own pages.

One flow from booking to payment, no phone tag.

Marketing

SEO and GEO

Weekly content plus AI-search work: FAQ structured data, rebuilt room pages, and the work that gets World Spa cited when people ask an AI assistant where to go, not just when they search Google.

Organic clicks on rebuilt room pages up 2.3x.

Analytics

Marketing analyst system

Reads GA4 and Search Console and reports what's moving. Runs alongside World Spa's own in-house marketer, who decides what to act on.

The marketer spends less time pulling reports.

The numbers

What the data shows, nothing rounded up.

These come from World Spa's own Search Console and GA4, not from a pitch deck.

Organic search, September 2026
1,000+

Non-brand Google clicks a month

People who searched for a spa, not for World Spa: "spa brooklyn", "hammam nyc", "onsen nyc", "spa near me". Search Console, 28 days to Sep 25, 2026; clicks Google shows without a query are not counted.

Organic search
2.3x

Clicks on rebuilt room pages

After the room pages were rewritten. FAQ structured data is now live on 29 URLs across the site.

Where it runs

The same team, still running the same systems.

World Spa has been a client since 2023. The systems run every day: the AI concierge answers guests, bookings flow through Adyen, and the marketing analyst agent reads the numbers weekly, all alongside the spa's own in-house marketer.

What's next is AI-search presence: showing up when people ask ChatGPT and other assistants where to go, not only when they search Google.

Every day
AI concierge
About 40 guest questions a day; bookings and complaints go to the spa’s phone line.
Every week
Marketing analyst
Reads GA4 and Search Console, reports what moved, runs alongside the spa's own marketer.
Ongoing
AI-search presence
GEO work so World Spa gets cited when people ask an AI assistant, not just when they Google.
For the technical reader Under the hood: what we actually built
→

This section is for engineers and operators who want the architecture, not the summary.

Booking and payments

Booking runs through the spa's own PMS, with Adyen wired in for payments. We built the integration server-side rather than as a browser widget, so checkout stays on World Spa's own pages and we control retries and edge cases directly.

AI concierge

A standalone service on the Claude API, built for World Spa. Knowledge base comes from the spa's own pages and policies. The concierge answers what it can and sends booking requests and complaints to the spa’s phone line, about 40 guest questions a day.

Marketing analyst

Reads GA4 and Search Console and reports what's moving. Runs alongside the spa's own in-house marketer, who decides what to act on.

SEO and GEO

Weekly content plus AI-search work: FAQ structured data live on 29 URLs, rebuilt room pages, and monitoring of how AI assistants answer questions about spas in Brooklyn.

Operating posture
  • Same team across the three years, no account-manager layer between client and engineers
  • Monthly review of what's working and what's next, alongside the spa's own marketer
  • Client data stays in the client's own accounts
What we deliberately don't do
  • No proprietary lock-in on data, everything lives in the client's own accounts, exportable anytime
  • No feature gates, what World Spa has today is what World Spa can see and export

Want the same setup for your business? Describe it.

A one-page plan in 48 hours: what to build first, what it costs. Free, from the founder.

Or talk first

Simple4u is a six-person team: founder in Brooklyn, engineers in Kyiv. Embedded with World Spa since 2023, rebuilding NYC by Yacht’s site and search since December 2025, and our own company on the same kind of systems.

Prefer to talk first: book a call with Slava Phone: (929) 640-6940 Email: office@simple4u.io Based in Brooklyn, NY. We work with clients anywhere; in New York we come to you. Download PDF case study

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