Consulting and Definition
We analyze and define requirements against real business goals.
SERVICE
Custom Web and Mobile App Development
Nearshore custom web and mobile app development for US companies: native, hybrid, and web apps shipped to production every week, in your time zone.
We build custom web and mobile apps
At Fuix, we design and build custom web and mobile app development for companies and startups. We use a modern stack and agile delivery to ship high-performance products your users actually rely on. We work as your external technical team, with a single technical owner and weekly releases to production — real functionality, not demos.
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Mobile applications
Native (Android, iOS) and hybrid apps with Flutter or React Native.
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Web applications
SPAs, PWAs, and dashboards with Vue.js, React, or Angular.
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Enterprise software
ERP systems, CRM, and process automation.
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APIs and integrations
REST, GraphQL, and third-party integrations.
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No Code / Low Code
Solutions that don't require advanced programming.
WHAT'S INCLUDED
Our Custom Web and Mobile App Development solutions.
UX/UI Design
We prototype user experience and interface before writing code.
Agile Development
Iterative construction with weekly releases to production.
Testing and Quality
We verify functionality, security, and performance before every release.
Launch and Maintenance
App Store / Play Store publication and continuous support.
Custom web and mobile app development
Custom web and mobile app development means building the product your business and your users actually need, instead of forcing your process into a template. Whether it’s a customer-facing mobile app, an internal operations dashboard, or a web platform that has to scale, the difference between a product that works and one that frustrates people is in the details — performance, reliability, and a design that matches how people really use it.
At Fuix we build web and mobile apps on a modern stack — React, Vue, and Angular on the web; React Native and Flutter on mobile; native Kotlin and Swift when the case calls for it. We’re a dedicated nearshore team based in Chile working US business hours, so you get senior delivery and real-time collaboration without building an in-house department or waiting on a distant offshore vendor.
Where the results come from
Good apps come from getting three things right. Clear definition: we start by turning your idea into concrete requirements tied to business goals, so we build what matters and skip what doesn’t. Design before code: we prototype the experience and interface first, because fixing a screen in a wireframe costs minutes and fixing it in production costs weeks. Quality at every release: functionality, security, and performance are verified before anything ships.
Web, mobile, and everything they connect to
Most apps don’t live alone. We build the APIs and integrations — REST and GraphQL — that connect your app to the ERP, CRM, payment providers, and third-party services it depends on, so data flows once and stays consistent.
Mobile app development: iOS and Android
Mobile app development comes with decisions the web doesn’t: choosing between native (Swift, Kotlin) or cross-platform (React Native, Flutter), publishing to the App Store and Google Play, handling push notifications, offline support and frictionless updates. We build custom mobile apps that talk to your existing systems —your ERP, your backend or your APIs— so the data is the same on the phone and in the office. If you’re not sure whether you need a native app or a PWA will do, that’s part of what we settle in the diagnostic.
How Fuix works
We ship to production every week with a single technical owner accountable for delivery. You get real, usable functionality each week, not demos or staging previews. Before each release the full flow is validated end-to-end; if it fails, it doesn’t ship, and you get full traceability of what changed. We use AI internally to accelerate development and review code — that’s how we sustain the weekly cadence without cutting corners.
Pricing is a fixed monthly fee by scope, not by the hour, so cost is predictable and our incentives are aligned with your outcome. We operate from Chile as a nearshore partner for US companies, overlapping your business hours end to end.
How much does it cost to build an app?
Most providers won’t publish a number. Here are ours, in USD, for a senior Chilean team working US hours:
| App type | What it includes | Range (USD) |
|---|---|---|
| Simple / MVP | One platform or cross-platform, core features, a light backend, minimal back-office | 8,000 – 15,000 |
| Mid-tier | iOS + Android, login, payments, push notifications, one integration with an existing system | 15,000 – 30,000 |
| Complex | Real-time, offline sync, multiple integrations, high user volume | 30,000 – 60,000+ |
| Dedicated team | Monthly fee for a team that ships continuously, 6-month minimum | 4,500 – 6,000/month |
Those are fixed-scope bands: you define what gets built, the amount is agreed, and that’s the amount. The dedicated team makes more sense when the product will keep growing and you’d rather reorder priorities than renegotiate every change. QA, store publishing and deployment are inside the price in both models — we don’t bill them as extras. What moves you between bands is broken down in how much it costs to build an app in Chile.
Book a call
The first conversation is free, runs in your time zone, and ends with a concrete next step. If you have an app to build or one that stopped keeping pace with your users, let’s scope it together. Book a call and leave with a clear plan.
FAQ
Frequently asked questions.
- How much does it cost to build a custom app?
- A simple or MVP app —one platform or cross-platform, core features, a light backend— runs USD 8,000 to 15,000. A mid-tier app with iOS and Android, login, payments, push notifications and one integration runs USD 15,000 to 30,000. A complex one, with real-time, offline sync or multiple integrations, starts around USD 30,000 and goes past 60,000. The alternative is a dedicated team at USD 4,500 to 6,000 per month with a 6-month minimum, which fits better when the product will keep growing. Those are fixed-scope market bands for a senior Chilean team working US hours, not a quote.
- Do you own the build end to end, or is this just supplying developers?
- We can own it end to end. As a dedicated team we take the scope and carry it through architecture, development, QA, store publishing and deployment to production, with one technical owner accountable for delivery — you're buying a shipped product, not headcount. If you'd rather keep ownership in house, our senior engineers can also embed in your team as staff augmentation under your tech lead. Both run on the same fixed monthly fee by scope and the same weekly release cadence, and QA and deployment are inside the fee either way: we don't bill testing, releases or store review as extras.
- Can the team work Pacific hours for a West Coast company?
- Yes. Chile is four hours ahead of US Pacific most of the year —five during the weeks the two daylight-saving changes don't line up— so a shifted schedule of roughly 1pm to 10pm in Santiago covers 9 to 6 Pacific in full. On US Eastern the overlap needs no shift at all: Chile sits one to three hours off. Either way you get same-day answers instead of an overnight queue.
- How fast can you have a senior team in place?
- Weeks, not a recruiting cycle. The engineers are already on our payroll in Santiago, so a first squad —senior engineer plus technical owner— starts from the agreed scope rather than from a candidate search, and ships something usable to production in its first week.
- Should we build native or cross-platform?
- It depends on the case. Native (Swift, Kotlin) wins when you need deep device access or maximum performance; cross-platform (React Native, Flutter) wins when you need iOS and Android from one codebase and time to market matters more. We settle this in the diagnostic instead of defaulting to whatever we prefer.
- Do we need a native app or is a PWA enough?
- Plenty of cases that get scoped as native apps are solved better by a progressive web app: no store review, no install friction, one codebase. Others genuinely need native. Deciding which one you are is part of the diagnostic, before anyone writes code.
- How long until we have something working?
- You get usable functionality in production every week from the start, not one big delivery at the end. Before each release the full flow is validated end to end; if it fails, it does not ship and moves to the next release.
- Can the app connect to our ERP and existing systems?
- Yes. We build the REST and GraphQL APIs and integrations that connect the app to your ERP, CRM, payment providers and third-party services, so data is entered once and stays consistent between the phone and the office.
- Do you publish to the App Store and Google Play?
- Yes, including the parts that usually get forgotten: push notifications, offline support and frictionless updates. Store publishing and review are handled as part of delivery, not left to your team.