Mobile app development with a team in your time zone
We design and build iOS and Android apps connected to your operations: orders, payments, inventory, customers and notifications — from prototype to store release and ongoing support.
In short
What does Julsmind offer in mobile app development?
Julsmind SAS is a software development company based in Medellín, Colombia, that designs and builds native and cross-platform (React Native) mobile apps for iOS and Android. The service covers discovery, UX/UI design, backend and APIs, integrations with payments and existing systems, QA, App Store and Google Play release, and ongoing support. An app MVP typically takes 6 to 12 weeks depending on scope.
An app that works as part of your business
A standalone app is a cost. An app connected to your orders, inventory and customers is a sales and operations channel.
iOS and Android
One cross-platform codebase, or native apps when the project demands it.
Connected to your systems
Integration with your ERP, CRM, e-commerce or database so data flows on its own.
Payments
Card and wallet payments through gateways that fit your market.
Push notifications
Segmented messages for reminders, reactivation and order updates.
Admin panel
A web panel to manage content, users, orders and app metrics.
Same-time-zone team
Live collaboration during US business hours, not overnight handoffs.
What's included
- Discovery: goals, users and MVP scope
- Clickable prototype before writing code
- UX/UI design aligned with your brand
- Backend, database and APIs
- Payment, ERP, CRM or e-commerce integrations
- QA on real devices
- App Store and Google Play release
- Support, analytics and continuous improvement
How we build your app
- 1
Discovery
We define the problem, the users and the smallest scope that already delivers value.
- 2
Prototype
You validate the full flow in a clickable prototype before investing in development.
- 3
Sprints
Releases every one or two weeks, with test builds installable on your phone.
- 4
QA and release
Testing on real devices and handling of Apple and Google reviews.
- 5
Launch
We support go-live and measure real usage from day one.
- 6
Evolve
We iterate with data: new features, performance and support.
Technologies
- React Native
- TypeScript
- iOS
- Android
- Node.js
- Firebase
- AWS
- Google Cloud
- REST & GraphQL
- Push notifications
Frequently asked questions
How much does building a mobile app cost?
It depends on scope, integrations and design depth. We work fixed-scope, with a monthly hour bank or as a dedicated team. After a first call we send a proposal with estimated scope, timeline and cost within 48 hours, with no commitment.
What is it like to work with a nearshore team in Colombia?
Medellín is in Colombia's time zone (UTC-5, no daylight saving), so our working day overlaps with US business hours. You get real-time calls, sprint demos and a shared backlog, with an English-speaking point of contact.
Native or cross-platform?
For most business apps we recommend cross-platform (React Native): one codebase for iOS and Android, lower cost and simpler maintenance. We recommend native when the app relies heavily on device hardware or very demanding graphics.
Do you have your own apps in the stores?
Yes. Besides client work, Katuq — the ERP we build at Julsmind — has apps published on the App Store and Google Play.
Tell us about the app you have in mind
We help you define the right MVP and send a proposal with estimated scope, timeline and cost within 48 hours.
Get a quote