Mobile Apps Users Love & Businesses Scale On
Native iOS & Android, Flutter and React Native — 180+ projects of experience distilled into apps that are fast, beautiful and built to grow.
At a Glance
- Engagement
- Fixed-price or dedicated team
- First response
- Within 1 business day
- Scoped quote
- Within 48 hours
- Ownership
- Full source & IP transferred
Core Stack
Mobile App Development Services
iOS App Development
Swift and SwiftUI apps polished to Apple's standards — App Store submission handled end to end.
Android App Development
Kotlin-first Android apps optimized across the device ecosystem, from flagships to budget devices.
Cross-Platform Apps
Flutter and React Native apps that ship to both stores from one codebase — without feeling cross-platform.
AI-Powered Mobile Features
On-device ML, smart recommendations, chat assistants and personalization that lift retention.
App Modernization
UX overhauls, performance rescues and migrations for apps that have outgrown their first build.
App Strategy & MVP Sprints
Validate your idea with a production-quality MVP in 6–10 weeks, instrumented for learning.
The KeasBrain Difference
- Full lifecycle partner — Strategy, design, build, store launch, ASO and post-launch growth under one roof.
- Performance as a feature — 60fps interactions, fast cold starts and crash-free rates above 99.5%.
- Designed for retention — Onboarding, notifications and personalization engineered around user habits.
- Transparent delivery — Weekly builds in your hand via TestFlight and Play Console from sprint one.
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Years of Experience
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Projects Delivered
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Happy Clients
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Client Satisfaction
A Clear Path From Idea to Impact
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1
Discover
Free consultation + scope audit
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2
Design
Architecture & UX validated upfront
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3
Build
Agile sprints with weekly demos
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4
Scale
Launch, monitor & optimize
Tools & Platforms We Use
Mobile App Development Questions
If you need maximum platform polish or heavy device APIs, go native. For most products, Flutter or React Native delivers 90% of the experience at substantially lower cost. We recommend based on your roadmap, not our preference.
MVPs typically range $8,000–$25,000; feature-rich products higher. After a free consultation you receive a fixed, itemized quote within 48 hours.
Yes — store accounts, listings, screenshots, review responses and ASO are all included in delivery.
Absolutely. We regularly retrofit recommendation engines, AI chat, vision features and smart search into existing iOS and Android apps.