Android Apps,Built for Every Device, Not Just the FlagshipKotlin & Jetpack Compose. In-House UK Engineers. Zero Subcontractors.
No app that only works on the latest Pixel. No ANRs crashing your Play Store rating. We write a fixed-price Technical Specification before a line of Kotlin is touched — you approve it, we build exactly to it, and you own everything on delivery.
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Android App Development Services We Deliver
From MVPs to apps running across thousands of device configurations — every project is scoped, specified, and delivered by our in-house team of 150+ UK-based engineers.
Kotlin & Jetpack Compose Apps
Modern declarative UI with Material 3 design, not legacy XML layouts.
- Jetpack Compose UI
- Material 3 theming
- Multi-form-factor layouts
- Accessibility (TalkBack) support
MVVM / Clean Architecture
Testable, maintainable app architecture that survives team changes.
- MVVM & Clean Architecture
- Dependency injection (Hilt)
- Coroutines & Flow
- Modularised app structure
Play Store Deployment
Release management and staged rollouts, handled end to end.
- Play Console setup
- Staged & internal rollouts
- App Bundle optimisation
- Play Store listing & ASO
Background Services & WorkManager
Reliable background processing that survives Android’s battery optimisation.
- WorkManager scheduling
- Foreground services
- Battery-efficient background sync
- Push notifications (FCM)
Firebase Integration
Analytics, crash reporting, and remote config, wired in from day one.
- Firebase Analytics & Crashlytics
- Remote Config & A/B testing
- Firestore & Realtime Database
- Firebase Auth integration
Performance & ANR Diagnostics
Profiling and ANR-free releases across low and high-end devices.
- Android Profiler diagnostics
- ANR & jank elimination
- Memory leak detection (LeakCanary)
- Startup time optimisation
Why UK Businesses Choose Mtoag for Android App Development
Three things that separate us from every other agency in the UK.
Fixed-Price. No Surprises.
Before writing a line of code, we produce a Technical Specification — a fixed-price, fixed-scope document listing every feature, integration, and delivery milestone. You sign it. We build it. The price you sign is the price you pay.
150+ In-House Engineers. No Subcontractors.
100% of Mtoag's engineering work is done by direct employees — never freelancers, never agencies, never offshore subcontractors. Your senior developer has worked at Mtoag for an average of 4+ years.
Full IP Ownership from Day One.
Your source code, design files, and all intellectual property transfer to you on final payment. We sign an NDA before any technical discussion. No vendor lock-in.
The Tech Stack That Powers Our Solutions
Sixteen years of production experience across mobile, web, enterprise, open-source, and search — every technology below is one we ship for UK clients, not just list on a page.
From native performance to cross-platform speed, we build mobile experiences that feel first-class on every device.
Modern, fast, accessible websites and web apps built on frameworks that scale with your business, not against it.
Enterprise-grade architecture built for security, compliance, and systems that need to talk to each other reliably.
Proven open-source platforms customised and hardened for real commercial traffic — not a stock install.
Technical SEO built into the codebase from day one — because rankings are an engineering outcome, not a marketing add-on.
All versions current as of July 2026. We track and adopt major releases within 90 days.
Android App Development Case Studies
All projects live in production since launch.
Our Android App Development Process
The same six-step process on every project. No improvising. No scope creep. No surprises.
Discovery and Technical Scoping
A structured 45-minute discovery call followed by a written Technical Specification defining every feature, integration, performance target, and accessibility requirement. You review and sign it before we charge a penny.
Architecture and Prototype
Technical architecture decisions and a working prototype covering the core user flows, so decisions are validated before full development begins.
Agile Development and Build
Two-week sprints with a live staging environment accessible 24/7. Weekly video demos and Slack access to your project manager. All code reviewed by a senior engineer before it merges.
Quality Assurance Testing
Automated unit and integration testing, manual regression testing, and a full accessibility and performance audit before anything ships to production.
Launch and Monitoring
Zero-downtime deployment with instant rollback capability. Performance monitored for 30 days post-launch, with fixes included in the launch fee.
Support and Ongoing Development
Post-launch SLA options from 8-hour response to 24/7 monitoring. Monthly security patches, dependency updates, and performance reports. Ongoing feature development available on sprint retainer.
All timelines are fixed in the Technical Specification.
Start Your Project — Get Free AuditAndroid App Development Quality Standards
Every Mtoag project is measured against the same benchmarks before it ships.
- Google Lighthouse Performance: 90+ target on every project
- WCAG 2.2 Level AA: all interactive elements, contrast, and keyboard navigation tested and passed
- Core Web Vitals: LCP under 2.5s, INP under 200ms, CLS under 0.1 — measured on real UK network conditions
- Cross-browser and cross-device tested before every release
Android App Development Questions Answered
10 direct answers. No sales language.
Android app development in the UK is typically quoted as a fixed project price after scoping, ranging from £12,000 for a focused MVP to £70,000+ for a complex multi-feature app with backend integration. Mtoag provides a fixed quote from a written Technical Specification.
Kotlin, as standard, for all new Android projects — it is Google’s recommended language and reduces boilerplate compared to Java. Mtoag maintains existing Java codebases where a full rewrite is not warranted.
Jetpack Compose is Android’s modern declarative UI toolkit, replacing XML layouts. Mtoag builds new Android apps with Jetpack Compose as standard, delivering faster development and more consistent UI across screen sizes.
Mtoag tests across a defined matrix of screen sizes, Android OS versions, and performance tiers — not just flagship devices — and builds adaptive layouts and performance safeguards so the app works reliably on mid-range and low-end hardware too.
Application Not Responding errors occur when the main thread is blocked for too long. Mtoag prevents ANRs through Coroutines-based asynchronous work, WorkManager for background tasks, and Android Profiler diagnostics run before every release.
Yes. Every Mtoag Android app includes Play Console setup, staged rollout configuration, App Bundle optimisation, and ASO-optimised store listing copy as part of standard delivery.
A focused MVP Android app takes 6–10 weeks from kick-off to Play Store submission. Complex apps with backend integration and offline support take 10–16 weeks. Every project receives a fixed timeline in the Technical Specification.
Yes, 100%. All Kotlin source code, design files, and Play Store assets created for your project belong to you from day one, written into every Mtoag contract as standard.
Yes, when it suits the requirements — Mtoag builds Flutter and React Native apps for cross-platform projects. For apps needing deep platform integration or maximum performance, Mtoag recommends native Kotlin and Swift builds instead.
Every project includes a 30-day post-launch support window covering bug fixes at no extra cost. Ongoing maintenance, Android version compatibility updates, and feature development are available on a monthly retainer after that window closes.
Still have questions? Call our team: +44 (115) 888-0557
Serving Android App Development Clients Across the UK
UK project managers available for on-site visits. Remote delivery available worldwide.
Let's Build Your Android Project.
Free Audit. No Commitment.
Tell us what you need to build. We'll send a free Technical Specification within 5 business days — with fixed scope and fixed cost.