Built for Startups Mobile Apps Flutter, Kotlin & Jetpack Compose Get In Touch From idea to App Store in 8–14 weeks. We build cross-platform apps with Flutter and native Android apps with Kotlin & Jetpack Compose, for startups in the US, UK, Australia, Canada, and UAE. See Our App Portfolio

Flutter or Kotlin — Which Is Right for Your App?

Not sure which technology fits your project? Here's how to choose.

Flutter, Cross-Platform (iOS + Android)

One codebase. Two platforms. Faster launch.

Flutter lets us build a single app that runs natively on both iOS and Android from one shared codebase. For startups, this means 30–40% lower development cost and significantly faster time to market, without sacrificing performance or design quality.

Best for:

  • Pre-seed and seed startups launching their first app
  • Founders who need to validate their idea quickly
  • On-demand platforms, marketplaces, SaaS companion apps, EdTech, HealthTech
  • Projects where budget efficiency is a priority

Typical timeline: 8–14 weeks for MVP  |  Starting from $8,000

Kotlin + Jetpack Compose, Native Android

Maximum performance. Deep Android integration.

Kotlin with Jetpack Compose is Google’s modern standard for native Android development. It delivers the highest performance, deepest device integration, and full access to Android-specific features, essential for apps where security, speed, or hardware access is non-negotiable.

Best for:

  • Fintech apps — payment systems, trading platforms, wallets
  • Healthcare and medical device integration
  • Enterprise Android apps with complex workflows
  • Apps requiring Bluetooth, NFC, camera, or biometric integration
  • Startups that are Android-first by market or investor requirement

Typical timeline: 12–20 weeks  |  Starting from $12,000

Industries We Build Mobile Apps For

We've built apps across these verticals. Each requires a different product mindset, and we've got experience in all of them.

Fintech & Payments

Payment wallets, investment platforms, expense trackers, and lending apps. We understand PCI compliance, data security, and the performance requirements of financial applications.

HealthTech & Fitness

Patient management apps, wearable sync (Apple Health, Google Fit), fitness trackers, telehealth platforms, and appointment booking systems.

On-Demand & Marketplace

Food delivery, home services, freelance marketplaces, and ride-sharing companion apps. We build the customer app, service provider app, and admin dashboard.

EdTech & E-Learning

Course platforms, quiz apps, interactive learning tools, and student/teacher portals. A fast-growing vertical in the US, UK, and Australia.

SaaS Mobile Companion Apps

Many B2B SaaS products need a mobile companion for their users. We build Flutter apps that connect to your existing web platform via API, same data, optimised mobile experience.

E-Commerce & Retail

Branded shopping apps, loyalty programs, product catalogue apps, and WooCommerce-connected mobile storefronts.

How We Build Your App - 5 Steps

A clear process from first call to App Store launch.
Step 1
Discovery & Scoping (Week 1)

We map your user journeys, define core features for the MVP, agree on tech stack (Flutter or Kotlin), and produce a detailed project scope and timeline. No ambiguity before we start.

Step 2
UI/UX Design (Weeks 2–4)

Our designers build Figma wireframes and high-fidelity prototypes. You see every screen before a line of code is written. We iterate until the design is exactly right.

Step 3
Development Sprints (Weeks 4–12)

We build in 2-week sprints. After each sprint you get a testable build on your device, not a presentation, an actual app. You can test, give feedback, and approve as we go.

Step 4
QA & Testing (Weeks 12–14)

Full device testing (Android phones and tablets, iOS if Flutter), performance profiling, security review, crash testing, and accessibility checks before we submit to the stores.

Step 5
Launch & Post-Launch Support

We handle App Store and Google Play submission, store listing optimisation, and go-live support. Post-launch maintenance retainers available from $500/month.

Apps We've Built

Marketing Planning

A wonderful serenity has taken possession of my entire soul, like these sweet mornings of spring which I enjoy with my whole heart.

Mobile App Design

A wonderful serenity has taken possession of my entire soul, like these sweet mornings of spring which I enjoy with my whole heart.

Web Design Service

A wonderful serenity has taken possession of my entire soul, like these sweet mornings of spring which I enjoy with my whole heart.

Frequently Asked Questions

Should I build my startup app with Flutter or Kotlin?

If you need both iOS and Android, have a limited budget, and want to launch fast — choose Flutter. If you need an Android-only app with deep device integration, complex performance requirements, or hardware access (Bluetooth, NFC, biometrics) — choose Kotlin with Jetpack Compose. We’ll help you decide on the discovery call.

How long does it take to build a mobile app for a startup?

A Flutter MVP typically takes 8 to 14 weeks from design kickoff to App Store submission. A Kotlin native Android app takes 12 to 20 weeks. Timelines depend on the number of features, third-party integrations, and your feedback turnaround speed.

Do you submit the app to the App Store and Google Play?

Yes. We handle the full submission process for both Google Play Store and Apple App Store, including store listing setup, screenshots, app descriptions, and compliance requirements. You receive a submitted, approved app.

Can you build both the mobile app and our website?

Yes. The Bitecode builds both WordPress websites and mobile apps. Many of our clients start with a WordPress site and add a Flutter app, or build both simultaneously. We offer bundled pricing for combined projects.

What happens after the app launches?

We offer ongoing maintenance retainers covering OS compatibility updates, bug fixes, performance monitoring, and new feature development billed per sprint. We don’t disappear after launch.

Do you sign an NDA before starting a project?

Yes. We sign a Non-Disclosure Agreement before any project discussion. Your idea, business model, and technical architecture are fully protected.

How much does it cost to maintain a mobile app after launch?

Our post-launch maintenance retainers start at $500/month for Flutter apps and $750/month for Kotlin native apps. This covers OS updates, minor bug fixes, and performance monitoring. New feature development is scoped and billed separately.

Got an app idea? Let's talk.

We’ll tell you honestly whether Flutter or Kotlin is the right fit, give you a rough budget range, and outline what an MVP for your idea would look like, all in a free 30-minute call.