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Start.cat

Custom mobile apps

Mobile app development for iOS and Android

We design, build and publish native and hybrid apps, with the same team from the first sketch to maintenance. Since 2012 we have shipped loyalty apps, catalogues, clinical research tools and community apps to the stores.

What we do

Everything included

  • iOS and Android from one codebase

    We work with React Native to get a native app on both platforms without doing the work twice. When needed, we drop down to native code.

  • UX and interface design

    We define flows and screens around the people who will use the app every day, and validate them with prototypes before coding.

  • Backend and admin dashboard

    We build the API, the database and the dashboard where your team manages content, users and notifications.

  • Integrations

    We connect the app to your systems: catalogues, ERP, CRM, payments or corporate sign-in.

  • Publishing on the stores

    We prepare the listings, handle Apple and Google reviews and help you with the developer accounts.

  • Maintenance and growth

    We keep the app up to date with every iOS and Android release and add features when the business needs them.

How we work

From the first sketch to people's hands

  1. Discovery

    A 30-minute call to understand goals, users and constraints.

  2. Proposal and design

    Scope, timeline and budget with no small print; then a prototype of the key screens.

  3. Development

    Short iterations with test builds on your phone so you can see the app take shape.

  4. Launch and maintenance

    Publishing on the stores, monitoring and continuous improvement.

TechnologyReact NativeiOSAndroidNode.jsSupabase

FAQ

What people ask us most

Native or hybrid app?

For most projects we use React Native: a single codebase for iOS and Android with native performance and look. If a part needs very device-specific features, we build it in native code.

How much does it cost to build an app?

It depends on the scope: how many screens, which integrations and whether you need an admin dashboard. After a 30-minute call we send you a proposal with scope, timeline and budget, with no small print.

How long does it take?

That also depends on the scope. The proposal includes a phased timeline, with test builds you can install on your phone from the start.

Do you publish the app on the App Store and Google Play?

Yes. We prepare the listings, handle the Apple and Google reviews and leave everything ready for future updates.

Do you maintain the app after launch?

Yes. We keep apps up to date with new iOS and Android releases and keep growing them; some of the apps we have built have been on the stores for years.

Contact

Got a project in mind? Tell us about it and we'll get back to you within 24 hours.

  1. You write to usTell us the idea, even if it's just a sketch.
  2. We talk for 30 minutesA call to understand what you need.
  3. A clear proposalScope, timeline and budget, no small print.
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