Nexaura
FR

Mobile app development for Saint Martin businesses

From a villa in Grand Case, a diver books tomorrow morning's dive and gets a reminder the evening before. Your crew sees how many places are left on the boat. We design and build this kind of app remotely from France, for iPhone and Android.

Book a free call

Four plans, depending on what your customers need to do

  • Essential App

    A simple app to present your business, with the essential features. On one type of phone: iPhone or Android, your choice. For both, see the Pro App.

    Timeline: 10 to 15 days

    From €6,500

  • Pro AppOur pick

    Your customers create an account and always see your up-to-date information. Your messages appear on their phone screen, such as offers, reminders or news. On iPhone and Android.

    Timeline: 15 to 20 days

    From €11,000

  • Business App

    Your customers have their account, receive your messages and pay directly in the app, without leaving it. On iPhone and Android.

    Timeline: 20 to 30 days

    From €18,000

  • Custom App

    For large projects: a platform where several sellers offer their products, with live tracking. Everyone has their own access, and you manage everything from a complete back office.

    Timeline: 30 days or more

    From €35,000

Starting prices, excluding taxes (any taxes depend on your country or territory and your situation; the quote specifies them), in euros. After a free 20-minute call, you receive a written quote within 48 hours.

You pay in three stages, as the project progresses, never everything upfront

  • 30% at the start

    The project begins: we design the screens of your app and set the schedule with you.

  • 40% when you approve the test version

    You test the app on your own phone before it is published.

  • 30% on delivery

    Your app is live on the App Store (iPhone) and Google Play (Android). We hand over its source code, the files that make it work.

App ideas for St Martin businesses

  • Dive and boat trips

    Customers book a trip, give their certification level and receive a reminder the day before. You see the places left on each boat and for each departure.

  • Food delivery around Marigot

    Customers order from their phone and your drivers see their delivery round. You follow each order from the kitchen to the door.

  • Hurricane-season alerts

    The Atlantic hurricane season runs from 1 June to 30 November. With the Pro App, a notification on your customers' phones tells them you are closing or reopening.

After launch: looking after your app

Apple and Google change their rules every year. Without updates, an app can stop working or be removed from the stores. The first month of support is included.

Essential

The basics

€49 / month

  • Updates required by Apple and Google
  • A backup copy every week
  • Security updates
  • Support by email within 48 hours

Pro

More follow-up

€129 / month

  • Everything in Essential, plus:
  • A backup copy every day
  • Priority support within 24 hours
  • Day and night monitoring: we are alerted if your app stops responding

Business

With changes included

€249 / month

  • Everything in Pro, plus:
  • Support within 12 hours
  • Up to 5 hours of changes per month (texts, prices, photos…)
  • A dedicated contact person

Enterprise

For large companies

Custom quote

  • Everything in Business, plus:
  • Support day and night, 7 days a week
  • Response times set in the contract
  • Servers reserved for your app
  • A full review every 3 months

Pay yearly and you pay for 10 months instead of 12. Beyond the included hours of changes: €65 per hour. All prices exclude taxes.

How the project runs

  1. Free call

    A free 20-minute call to understand your business and spot what costs you time or customers.

  2. Written quote

    Within 48 hours: what we will build, the timeline and the price. Nothing starts without your approval.

  3. Build

    You follow progress every week and test everything yourself before launch.

  4. Launch and follow-up

    We go live, look at what works and adjust with you. For a website or an app, the first month of support is included; for an AI agent, follow-up is part of the subscription.

Frequently asked questions

How long does it take to build an app?
From 10 to 30 days for most projects, depending on the plan. The written quote, sent within 48 hours of the free call, gives the exact timeline.
Can I alert my customers during hurricane season?
Yes, from the Pro App: your message appears on the screen of every customer who has allowed notifications. You write it yourself, for example to announce a closure or the day you reopen.
Can customers pay in US dollars in the app?
Payment inside the app comes with the Business App. Before setting anything up, we check with you which currencies your payment provider accepts and what each one costs in fees.
Can you build a booking app for boat trips or dives?
Yes. Bookings, divers' levels, reminders and places left per departure are typical features. We start from how your day really runs: tell us about it during the free call.
iPhone, Android, or both?
The Essential App works on one of the two, your choice. From the Pro App, it works on iPhone and Android: we build it once for both, which lowers the price and the timeline.
Who puts the app on the App Store and Google Play?
We do. It is published on Apple and Google accounts opened in your name, so that it stays yours. The registration fees charged by Apple and Google are paid by you: we state them in the quote.
Does the app belong to me?
Yes. Once the project is paid in full, the app is yours, with its content and its source code.
What happens after delivery?
The first month of support is included. After that, a monthly plan covers the updates required by Apple and Google, security and backups. The Business plan also includes up to 5 hours of changes per month (texts, prices, photos…).

Tell us about the app you have in mind.

A free 20-minute call to discuss your idea, then a written quote within 48 hours. No commitment.