How long does it take to build a mobile app?

Most mobile apps take 6-14 weeks from kickoff to app store submission. Simple apps with standard features can be delivered in 6-8 weeks. Complex apps with custom backends, real-time features, or AI integration typically take 10-14 weeks.

Should I build native or cross-platform?

We recommend cross-platform (React Native or Flutter) for most projects — it covers iOS and Android with one codebase at 40% lower cost. Native development (Swift/Kotlin) is better when you need maximum performance, complex device integrations, or platform-specific UX that cross-platform cannot achieve.

Do you handle App Store and Google Play submission?

Yes. We handle the entire submission process including App Store Optimization (ASO), screenshot preparation, policy compliance checks, and responding to reviewer feedback. We pre-check against Apple and Google guidelines before submission to avoid rejections.

What's included in your mobile app development service?

Every project includes: architecture planning, UI/UX design, development in 2-week sprints, QA testing across 30+ device configurations, CI/CD pipeline setup, app store submission, and 30 days of post-launch support. You get a dedicated project manager and direct access to your development team.

Can you build an MVP for my startup idea?

Absolutely. We specialize in startup MVPs with budgets from $2,500 to $15,000. We help you identify core features, strip unnecessary complexity, and ship a testable product in 6-10 weeks. Many of our startup clients have gone on to raise funding with the MVP we built.

BUILD

Mobile App Development Services

Your app is live. Three stars. The reviews say 'crashes on Android 14' and 'why does this need access to my contacts?' Meanwhile, your developer says it works fine on his phone. His phone. One phone. In a world of twelve thousand device configurations.

We build mobile apps that survive the real world, not just the demo room.

Get Started See Our Process

The problem

Sound familiar?

The eternal beta

Your app has been 'almost ready' for four months. Every fix introduces two new bugs. The backlog grows faster than the team ships.

The platform gap

iOS works beautifully. Android is a disaster. Your Android users, 48% of your base, are treated as second-class citizens because the team only really knows Swift.

The performance spiral

Load time creeps up with every release. Users complain but you can't pinpoint why. The app is doing too much, too slowly, on too many threads.

The app store wall

Rejected again. Vague policy reason. Your team scrambles to interpret Apple's cryptic guidelines while your launch window closes.

Our approach

Here's how we fix this.

We build mobile apps that survive the real world, not just the demo room.

How we deliver

Our Mobile Development Process

Architecture & platform strategy

Week 1-2

We assess your requirements and choose the right approach, native, cross-platform, or hybrid, based on your users, your timeline, and your budget. No dogma, just engineering trade-offs.

Design & prototype

Week 2-4

Interactive prototypes on real devices, not just Figma screens. You tap through the experience before a single line of production code is written.

Build in sprints

Week 4-12

Two-week sprints with testable builds deployed to your device after each one. You never go more than 14 days without seeing progress you can hold in your hand.

QA across the matrix

Week 10-13

We test on 30+ device configurations, not one developer's phone. Performance profiling, accessibility checks, and edge-case coverage before any user sees it.

Launch & iterate

Week 13-14

App store submission handled. Review guidelines pre-checked. Post-launch analytics configured so you know exactly how users behave from day one.

What you get

Mobile Development Features & Deliverables

Production apps on iOS & Android

One codebase or native, optimized for your specific needs

CI/CD pipeline for mobile

Push to TestFlight/Play Console with every merge

Performance baseline & monitoring

Know before users complain

App store optimization

Screenshots, descriptions, and keywords that convert

Analytics integration

User flows, crash reports, and engagement metrics from day one

Push notification infrastructure

Re-engage users without being annoying

Proof, not promises

We've done this before.

Project Heartbeat•14 weeks (2 weeks architecture audit, 10 weeks rebuild, 2 weeks staged rollout)

PulseWell

Health & Wellness•45 employees, Series A startup

The situation

PulseWell had a React Native app serving 120K users for guided meditation, sleep tracking, and biometric-based stress scoring. Their Android experience was unusable, 6-second cold starts, janky scroll performance in their session library, and Bluetooth connectivity drops with wearable devices. They'd hit a 2.8-star Play Store rating and were hemorrhaging 400+ daily uninstalls. Their in-house team of two mobile devs had tried performance patches for four months with no meaningful improvement. The CEO told us their Series B depended on getting Android retention numbers in line with iOS within one quarter.

Technical challenge

The existing codebase had 73 native modules, most poorly bridged. The Bluetooth Low Energy (BLE) layer for wearable sync was written in raw Java with no error recovery, it silently failed on Android 12+ due to new runtime permissions. The app bundled 340MB of uncompressed audio assets with no lazy loading. Navigation used a deprecated library (react-navigation v4) causing memory leaks on Android when users moved between deep stack screens. Timeline: 14 weeks to full Play Store relaunch. Constraint: must maintain feature parity with existing iOS app and preserve all user data during migration.

What we did

Rebuilt the BLE communication layer using react-native-ble-plx with exponential backoff reconnection, proper Android 12/13 permission flows, and a connection state machine that handles 47 distinct edge cases across Samsung, Pixel, and OnePlus devices

Migrated navigation to React Navigation v6 with native stack, reducing screen transition overhead by 80% and eliminating the memory leak that was causing OOM crashes after 15+ minutes of use

Implemented audio asset streaming with background pre-caching using a custom native module wrapping ExoPlayer on Android, reducing initial bundle size from 340MB to 42MB

Rewrote the session library list with FlashList, virtualized rendering, and skeleton loading, achieving consistent 60fps scroll on devices as old as Samsung Galaxy A12

Set up Detox end-to-end testing across 12 device configurations in a CI pipeline using GitHub Actions with Firebase Test Lab integration for real-device testing on every PR

Results

Play Store Rating

2.8 stars→4.6 stars

Android Cold Start Time

6.2 seconds→1.1 seconds

Daily Uninstalls (Android)

410→38

BLE Connection Success Rate

61%→97.3%

Day-30 Retention (Android)

12%→34%

App Bundle Size

340 MB→42 MB

Technologies

React Native

TypeScript

ExoPlayer

Firebase Test Lab

GitHub Actions

FlashList

react-native-ble-plx

Detox

Fastlane

Sentry

Their engineering execution stands out. We onboarded 21,500 artists and reached 15,000 monthly active users. The team manages the project transparently, delivers on time, and communicates proactively.
— Elie Laforce, Managing Director, Zetwal AI

Tech stack

Built on what works.

Mobile

Expo

Database

Firebase

Mobile Development Pricing

Transparent, fixed-price packages. No hidden fees. 65% below comparable US agency rates.

MVP / Simple App

$800–$3,000

6–8 weeks delivery

Validate your idea with a production-ready app on both platforms.

✓iOS and Android (cross-platform)
✓Up to 8 core screens
✓User authentication
✓Push notifications
✓Basic analytics integration
✓App Store + Play Store submission
✓30 days post-launch support

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Standard App

$3,000–$8,000

8–12 weeks delivery

Feature-rich apps with custom backend, integrations, and polished UX.

✓iOS and Android (native or cross-platform)
✓Custom backend API
✓Payment integration
✓Real-time features (chat, sync)
✓Offline mode support
✓CI/CD for mobile builds
✓QA on 30+ device configs
✓60 days post-launch support

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Complex / Enterprise App

$8,000–$25,000+

12–20 weeks delivery

Enterprise-grade apps with complex integrations, AI features, or IoT.

✓Native iOS + Android (if needed)
✓AI/ML integration
✓IoT device connectivity
✓Enterprise SSO and security
✓Custom animations and UX
✓Multi-language support
✓Performance optimization
✓90 days post-launch support
✓Dedicated project manager

Get Free Quote

All prices are fixed-price estimates. Final quote provided within 4 hours of consultation. No hourly billing surprises.

Traditional Agency vs. CodeMiners

See why 200+ companies chose CodeMiners over traditional alternatives

Feature	Traditional US Agency	CodeMiners
Simple App (MVP)	$15,000–$50,000	$800–$3,000
Standard App	$50,000–$150,000	$3,000–$8,000
Complex App	$150,000–$500,000+	$8,000–$25,000+
Time to App Store	4–8 months	6–14 weeks
Platforms Covered	Usually one at a time	iOS + Android from day one
Device Testing	5–10 devices	30+ device configurations
App Store Submission	Extra charge ($2,000+)	Included in all packages
Post-Launch Support	$200+/hr retainer	Included (30–90 days)
Sprint Visibility	Monthly demos	Testable builds every 2 weeks
Pricing Model	Hourly (cost overruns common)	Fixed price (no surprises)

Mobile Development FAQ

Common questions about our mobile development services

Mobile app development at CodeMiners starts from $800 for simple apps and ranges up to $15,000+ for complex applications. Our pricing is 65% below comparable US agency rates. The exact cost depends on features, platforms (iOS, Android, or both), and complexity.

Mobile Development Resources

Mobile Development Guides & Insights

In-depth guides to help you plan, budget, and execute your mobile development project.

How to Choose a Mobile App Development Company

10 evaluation criteria, red flags, and cost comparison by company type.

Mobile App Development Services