Eight cases. One pattern.

Starting point

Das Deutsche Facharztzentrum looks after residents and holidaymakers from across Europe in Mallorca, at several sites with their own teams. There was no online appointment booking and no patient portal, the phone was the bottleneck, and the existing invoicing system was due to be replaced.

Our approach

Before anything was built, every screen existed as a clickable draft: websites, booking flow, patient portal, practice operations, billing and oversight. The system carries the group's name. It is being delivered in fixed stages.

Status: concept proposal. Every screen exists as a clickable draft. The system has not been implemented and is not in operation.

What the system covers

• AI phone assistant in German, English, Spanish and Swedish, booking straight into the calendar
• Online booking and rescheduling, waiting list with automatic replacements
• Patient portal: digital medical history before the appointment, invoices by link and PIN
• CRM with aftercare and birthday greetings
• Invoicing under the Spanish Verifactu requirement
• Management dashboard by site, speciality and doctor
• Waiting room display with call-up list

The idea

In a dental practice the day hangs on reception: calls, reschedules, gaps in the calendar, documentation after every treatment. Dentara takes that work off the team so it can concentrate on patients.

In the video

A patient calls and is booked automatically. In the room calendar an AI suggestion moves an appointment into a free gap. During the root canal treatment the transcript runs, and afterwards the dental chart and the billing proposal fill up.

What we built

• Voice reception that answers calls and books appointments
• Room calendar with AI suggestions for free gaps
• Digital registration with pre-filled patient data
• Transcript during the treatment
• Dental chart and billing proposal from the documentation
• No-show protection and practice analytics

The idea

Friday evening, a full house, the phone rings. Reservation platforms charge a fee per guest for this. OpenCarta answers the call itself, books the table and sends orders to the kitchen, with no commission.

In the video

The AI takes the call, switches from Spanish to English mid-conversation and books table 7 straight onto the table plan. A QR order lands on the kitchen display.

What we built

• AI reception on the phone, switching language mid-call
• Reservations straight onto the table plan
• QR ordering at the table
• Kitchen display for incoming dockets
• Your own booking channel with no fee per guest

The situation

The Mallorca Country Club in Calvià hosts an ATP 250 event and has more than 320 international members, across tennis, padel and fitness. Membership, court booking and club life currently run side by side instead of in one system.

Status: concept proposal. Every screen exists as a clickable draft. The system has not been implemented and is not in operation.

What we proposed

• Member database with roles for administration, staff and members
• Court and coach booking with member login
• Fees, contracts and shop in one place
• Events, tournaments and sign-ups
• Club communication to member groups, multilingual

The situation

Bodega Santa Catarina in Sencelles, D.O. Binissalem, has been making wine on 40 hectares since 1984. Its guests come from five language groups and ask in the shop, on the phone and on the website which wine suits them and how to visit.

Status: concept proposal. Every screen exists as a clickable draft. The system has not been implemented and is not in operation.

What we proposed

• Advice by voice and chat in Spanish, Catalan, English, German and Portuguese
• A taste quiz that leads to the right bottle
• Answers about the winery, its vineyards and vintages, drawn from its own material
• Booking for visits and wine tours
• Hand-off to the shop without switching language

The situation

Schools often notice late when a young person is struggling. They rarely ask, and when they do, it is not anonymous.

Status: concept proposal. Every screen exists as a clickable draft. The system has not been implemented and is not in operation.

What we proposed

• Anonymous weekly check-in with a handful of questions, as an app on the phone
• Scenario training on peer pressure, school stress, loneliness, cyberbullying, family conflict and fear of failure
• Feedback after each scenario, in the language young people use
• Dashboard for the school: mood across year groups, no individual profiles
• Multilingual, as an installable web app with no app store

The situation

Agents on Mallorca sell high-end properties through portals that look the same for every house. The first impression happens there, not with the agent.

Status: concept proposal. Every screen exists as a clickable draft. The system has not been implemented and is not in operation.

What we proposed

• Property pages with large images, video and floor plans
• Search by location, property type, price range and property ID
• Enquiries straight to the agent, including via WhatsApp
• Bilingual, German and Spanish, with its own editorial area

The situation

In an argument you write the message you regret later. Presence reads the tone of a message, names what is happening, and suggests a calmer wording.

Status: prototype. Built as a product, not on the market yet.

What we built

• Tone analysis with detected patterns such as defensiveness, avoidance or shutdown
• Suggested replies that keep the conversation open
• Three contexts: work, dating, relationship
• A practice track over several weeks instead of one-off tips