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App Development Agency

iOS · Android · Cross-platform · Web

App Development Agency for Custom Mobile & Web Applications

We help startups, growing businesses, and enterprises design, develop, and scale custom mobile and web applications. From initial strategy to deployment and ongoing support, our app development services turn business ideas into reliable digital products.

  • Discovery-led, ranged estimates
  • Senior product & engineering team
  • You own the code and IP
  • Launch plus long-term support

What we build

App development services for every stage

Whether you are validating a new idea, replacing a spreadsheet-driven process, or scaling a product that already has users, we cover strategy, design, engineering, and support under one roof.

View all services

Why work with us

Why choose our app development agency

Most app projects that struggle do so because of unclear scope, rushed architecture, or poor communication, not because of the code itself. Our delivery model is built to prevent those problems.

We plan in phases, share working builds every two weeks, and document decisions so your product is never dependent on one person. Read how we work in our app development process.

  • Strategy before code

    Every engagement starts with discovery, so estimates are grounded in real requirements and the riskiest assumptions get tested first.

  • Senior, cross-functional teams

    Product, design, engineering, and QA work together from day one, which keeps decisions fast and avoids hand-off gaps.

  • Security and privacy by design

    Secure authentication, encryption, least-privilege access, and dependency scanning are part of the baseline, not an upsell.

  • Built for performance

    We budget for startup time, smooth scrolling, offline behavior, and battery use, and measure them on real devices.

  • Transparent delivery

    You get access to the backlog, repository, and test builds. Two-week demos show working software and honest progress.

  • You own everything

    Source code, designs, credentials, and documentation belong to you. No proprietary lock-in, and clean handover if you build an in-house team.

Platform expertise

iOS, Android, and cross-platform expertise

Choosing between native and cross-platform development affects cost, performance, hiring, and long-term maintenance. We recommend the approach that fits your product, not the one that fits our bench.

Native iOS apps with Swift and SwiftUI

For products where polish, Apple ecosystem features, and the App Store audience matter most. We build with SwiftUI, adopt Swift concurrency for responsive UIs, and handle TestFlight, privacy manifests, and App Store review.

  • SwiftUI & UIKit interoperability
  • HealthKit, Apple Pay, widgets, Live Activities
  • Sign in with Apple & passkeys
  • App Store Connect release management
iOS selected

How we work

Our app development process

Six phases, each with clear deliverables and a decision point. You always know what is being built, why, and what it costs.

See the full process
  1. 011–3 weeks

    Discovery & product strategy

    We map goals, users, constraints, and integrations, then turn them into a prioritized scope. Technical risks such as third-party APIs, data migration, or compliance get investigated before any estimate is treated as final.

  2. 022–5 weeks

    UX research & UI design

    User flows and wireframes come first, then a clickable prototype you can put in front of real users. Visual design is built on a component library so engineering can reuse it rather than redraw it.

  3. 031–2 weeks

    Architecture & technical setup

    We choose the platform approach, data model, API contracts, and hosting with your growth path in mind. CI/CD, environments, error monitoring, and code standards are set up before feature work starts.

  4. 04Two-week sprints

    Agile development sprints

    Each sprint ends with a working build you can install on your phone, a demo, and an updated burn-up. You see progress in software, not status slides, and can re-prioritize as you learn.

  5. 05Continuous

    QA, security & performance testing

    Automated unit, integration, and UI tests run on every pull request. Manual exploratory testing covers real devices, accessibility, edge cases, and the flows that matter most to revenue or safety.

  6. 06Ongoing

    Launch, support & iteration

    We prepare store listings, handle App Store and Google Play review, and roll out with staged releases and monitoring. After launch, we keep the app current with OS updates and build the next roadmap from real usage data.

Industries

Industries we serve

Each industry brings its own regulations, integrations, and user expectations. We account for HIPAA in healthcare, PCI DSS in payments, FERPA in education, and real-world connectivity in the field.

All industries

Technology

Technologies we work with

We use mature, well-supported technologies with large talent pools, so your app is easy to maintain and hire for long after launch.

Explore our stack

Mobile

Web & Frontend

Backend & APIs

  • Node.js
  • NestJS
  • GraphQL
  • REST
  • Python
  • WebSockets

Cloud & DevOps

  • AWS
  • Google Cloud
  • Azure
  • Docker
  • Terraform
  • GitHub Actions

Data

  • PostgreSQL
  • MongoDB
  • Redis
  • Firebase
  • Supabase
  • Elasticsearch

Quality & Monitoring

  • XCTest
  • Espresso
  • Detox
  • Playwright
  • Sentry
  • Firebase Crashlytics

Solution blueprints

Featured app development projects

These blueprints show how we approach common app builds: the problem, the architecture, and the features that matter. They are representative examples of our approach, not client case studies.

View all blueprints

Healthcare blueprint

Telehealth & Patient Engagement App

Challenge: Clinics need secure video visits, appointment scheduling, and messaging that fit existing EHR workflows without exposing protected health information.

  • Video visits with waiting room
  • Scheduling & reminders
  • Secure messaging
  • Intake forms & consent
FlutterNext.jsNode.jsPostgreSQLAWS
Healthcare app development

Logistics blueprint

Field Operations & Delivery App

Challenge: Dispatchers lose visibility once drivers leave the depot, and paper proof-of-delivery creates billing disputes and slow invoicing.

  • Route & stop management
  • Offline proof of delivery
  • Live map tracking
  • Exception reporting
React NativeReactNode.jsRedisGoogle Cloud
Logistics app development

Fintech blueprint

Digital Wallet & Personal Finance App

Challenge: A financial product needs account linking, payments, and identity verification while keeping card data and sensitive PII out of its own systems where possible.

  • Bank account linking
  • Tokenized card payments
  • KYC onboarding
  • Spending insights
SwiftKotlinNode.jsPostgreSQLAWS
Fintech app development

Budget planning

App development cost and timeline

Cost depends mainly on the number of features, platforms, integrations, and compliance requirements. These ranges help you plan before a detailed estimate.

Typical app development cost and timeline ranges by complexity
Project typeTypical scopeEstimated costTimeline
MVP / proof of conceptCore user flow, basic auth, simple admin, one platform or cross-platform$30k – $90k8–14 weeks
Simple appContent, forms, profiles, notifications, standard APIs$25k – $60k2–4 months
Mid-complexity appPayments, real-time features, custom backend, integrations, analytics$60k – $150k4–7 months
Complex / enterprise appMulti-role platforms, offline sync, compliance, SSO, legacy integrations$150k – $400k+7–12+ months

Ranges reflect typical US-market agency rates and vary with scope, platforms, integrations, and compliance needs. They are planning estimates, not quotes.

Engagement models

Flexible ways to work together

Choose the model that matches how certain your scope is today. Many clients start with a fixed-scope discovery or MVP and move to a dedicated team as the product grows.

  • Fixed-Scope Project

    Best for: Well-defined MVPs and projects with clear requirements

    A defined scope, timeline, and price agreed after a discovery phase. Change requests are estimated individually so the budget stays predictable.

    • Predictable budget
    • Milestone-based billing
    • Best after discovery
  • Most flexible

    Dedicated Product Team

    Best for: Evolving products, roadmaps that change as you learn

    A cross-functional team — product manager, designers, engineers, and QA — working as an extension of your company on a monthly basis.

    • Flexible priorities
    • Stable team & velocity
    • Scale up or down monthly
  • Time & Materials

    Best for: Exploratory work, integrations, and ongoing improvement

    You pay for actual hours spent, with weekly reporting and agreed budget caps. Ideal when requirements are still forming or work is iterative.

    • Pay for work delivered
    • Weekly time reports
    • Budget caps available

Compare engagement models

FAQ

Frequently asked questions

Straight answers to the questions we hear most from founders, product owners, and IT leaders.

What does an app development agency do?

An app development agency plans, designs, builds, tests, and launches software applications for clients. A full-service agency like ours covers product discovery, UX/UI design, iOS, Android, cross-platform and web development, backend APIs, QA, app store release, and ongoing maintenance and support.

How much does it cost to build an app?

Most custom apps built by a US-based team fall between roughly $25,000 for a simple app and $400,000+ for complex, multi-platform products. Scope, number of platforms, integrations, and compliance needs drive the number. Our app development cost guide breaks down the factors in detail.

How long does it take to develop a mobile app?

A focused MVP typically takes 8–14 weeks, a mid-complexity app 4–7 months, and large enterprise products 7–12 months or more. Discovery and design usually add 3–6 weeks before full development, and they save time later by reducing rework.

Should I build a native app or a cross-platform app?

Cross-platform frameworks like Flutter and React Native suit most business apps and can reduce cost by sharing one codebase. Native Swift and Kotlin make sense when you need deep hardware access, platform-specific UX, or maximum performance. We explain the trade-offs in native vs cross-platform development.

Will I own the source code?

Yes. Our agreements assign intellectual property for project deliverables to you, and code lives in a repository you control. You also receive documentation, design files, and access to all accounts and infrastructure.

Do you work with startups and non-technical founders?

Yes. We help founders shape a lean MVP, choose a stack that will not need to be rewritten in a year, and plan the path from first release to product-market fit. See our startup app development approach.

Can you take over an existing app built by another team?

Yes. We start with a code and architecture audit, document risks, stabilize the build pipeline, and then agree on whether to refactor, modernize, or rebuild specific parts. Learn more about app modernization.

Book a free consultation about your app

Tell us about your idea, timeline, and budget. In a 30-minute call we will discuss approach, risks, and a realistic estimate range — no obligation.