Apps & websites for real-world businesses

Custom mobile apps & clean websites for small businesses.

Turn your idea or existing business into something customers can tap on their home screen. I build lightweight, modern apps and landing pages without agency-level pricing.

🚀 Portfolio pricing right now – lock in lower rates while I build case studies.
Based in New York • Building with React Native, modern web tools, and real small business needs.
Apps & websites done with you, not dumped on you.
Services

What I can build for you

I help small businesses get their own apps and clean websites without spending $20–50k on a big agency. Everything is built with modern tools and made to actually fit how you work day-to-day.

Apps

Starter app (template-based)

A clean, branded app for your business using proven layouts and features.

  • Home screen with your logo & colors
  • Services / menu with descriptions
  • Booking request or link to existing system
  • Contact, map, and basic info
Perfect for stylists, barbers, lash techs, trainers, small shops, and more.
Apps

Custom app (advanced features)

When you need more than the basics: payments, notifications, or custom logic.

  • In-app booking & payments (Stripe, etc.)
  • Push notifications for promos & openings
  • Loyalty / reward-style features
  • Setup help for App Store / Google Play
Good fit for busier shops, restaurants, and local services.
Websites

Modern landing pages & sites

A simple, fast website that matches your app and gives you a professional home online.

  • One-page or multi-section website
  • Mobile-friendly & fast-loading
  • Clear call-to-actions (booking, call, DM)
  • Can match your existing brand or we create one
Great if you’re ready to look more legit than “just an Instagram page”.
Why it matters

Why have an app and site, not just social media?

Social is great for attention, but apps and websites are where repeat customers live. They make it easy for people to find you, book you, and come back.

1
You live on their home screen
Instead of being another post in the feed, you’re a tap away every time they unlock their phone.
2
Direct connection to customers
Send push notifications, update services, or run promos without fighting algorithms.
3
More professional & easier to trust
When people see a proper app and website, they instantly know you take your business seriously.
4
Built to fit how you actually work
No bloated, confusing software. Just the features you need for your flow.
Built with you, not dumped on you.

I don’t just ship something once and disappear. I walk you through what’s built, how to use it, and what’s possible next.

From there, you can:

  • Use your app/site to close more clients from Instagram and referrals.
  • Book appointments while you sleep.
  • Send last-minute openings, promos, or updates.
Booking-focused Service-based Local businesses
Process

How working together works

Simple, clear steps so you always know what’s happening and what’s next.

1
Quick intro call
We talk about your business, what you want your app or site to do, and your budget. No pressure, just clarity.
2
Plan & pricing
I outline the features, timing, and cost in plain language. You approve it before anything is built.
3
Build & preview
I build your app/website and send previews so you can see it on your phone and give feedback.
4
Launch & support
We launch, I show you how to use everything, and I’m available for fixes and future upgrades.
Portfolio-stage pricing

I’m in an active build phase right now — meaning you get more value for the price while I stack real-world examples and results.

If you’ve been thinking “I need an app or at least a proper website,” this is a good time to start.

Tell me about your idea
Work

Apps & ideas I’ve worked on

A few examples of what I’ve built and what’s in motion. Some are in active development and demo phases.

App • Local discovery

Sponti2Go

A “spin the wheel” app that helps people decide where to eat or what to do based on distance, categories, and local spots.

Built with React Native, Expo, Firebase, and location services.
App • City template

NR GO (New Rochelle)

A hyper-local version of the Sponti2Go concept focused on New Rochelle restaurants and places.

Shows how I can adapt an app template for specific towns, chambers, or local brands.
App • Service-based

Service & booking apps

Booking-focused apps for service businesses (beauty, grooming, etc.) with time slots, contact forms, and client info.

Integrating booking logic, email notifications, and optional payments.
Pricing

Portfolio-stage pricing (limited)

Right now, my focus is building a strong portfolio and long-term relationships, not charging agency rates. These ranges are to give you a realistic idea — final pricing depends on features.

Apps • Starter
From $XXX
Template-based, faster builds
  • Clean, branded app using proven layouts
  • Services/menu, basic booking or request form
  • Contact & business info
Good if you want something live quickly without going huge on budget.
Apps • Custom
From $X,XXX
More features & integrations
  • Custom booking & payments (Stripe, etc.)
  • Push notifications & promos
  • Feature ideas specific to your business
Best for busier shops and businesses ready to lean into tech.
Websites
From $XXX
Landing pages & small sites
  • One-page or multi-section marketing sites
  • Optimized for mobile & clear CTAs
  • Connect to booking, social, or apps
A solid option if you’re not ready for an app yet but want to look professional.
About

Who’s behind SpontaneousSpark?

I’m Luis — founder of SpontaneousSpark LLC and creator of Sponti2Go.

I care about two things: helping small businesses look like they belong in 2025 and building tools that are actually used, not just “nice to have”.

  • Hands-on with React Native, Firebase, and modern web tools.
  • Focused on service-based and local businesses.
  • Available to explain things in plain language, not tech jargon.
One builder. No big agency runaround.
Luis Mendoza
Founder, SpontaneousSpark LLC

If we work together, you’re talking directly with the person actually building your app or website — not getting passed around a big team.

You can DM me, send screenshots, ask questions, and be part of the process. That’s the advantage of working with a builder, not a giant agency.

Ready when you are — even if you’re “just exploring” and want to know what’s possible for your business.

Get in touch

Tell me about your app or website idea

Fill this out in a minute or less and I’ll get back to you with ideas and a rough range. No pressure, no pushy sales energy.

Or DM me on Instagram: @yourhandle and mention “APP” in your message so I know what it’s about.

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