Custom mobile app development services

From product discovery to App Store launch, we build native and cross-platform mobile apps for iOS and Android. You get senior engineers, predictable delivery, and transparent budget – with one team accountable end-to-end, whether you’re validating an MVP, scaling an existing product, or modernizing a legacy codebase.

10+

Building mobile apps

50+

In-house Talents

80+

Mobile apps built

OUR ACHIEVEMENTS

Top rated mobile app development company

We shipped our first mobile app in 2016 and earned Clutch’s “Top mobile app development” award in 2018 for the first time. Combined with nearly 30 five-star Clutch reviews and 100+ Upwork projects, our awards reflect partnerships that last.

CLIENTS

Trusted by leading global brands

From startups to Fortune 500 companies, we’ve partnered with organizations across industries to design and deliver high-performing digital products that drive real business value.

MOBILE APP DEVELOPMENT SERVICES

Mobile application development services we offer

From idea validation to long-term support, our full-cycle mobile services help teams ship apps faster, modernize legacy systems, and scale without compromising quality. Explore our services to find the right fit for your needs.

Custom native mobile app development

Custom native mobile app development

About service

Build iOS and Android apps from the ground up in Swift and Kotlin, including architecture, UI, backend integration, and store submission.

Best fit for

Ideal for products where performance, platform feel, and deep hardware access matter most – AR experiences, fintech with biometric auth, healthtech with sensor integration, or any app you expect to run and scale for the next 5+ years.

What you get

  • Full-cycle development from discovery to App Store and Play Console release.
  • Predictable delivery with weekly demos and transparent budget tracking.
  • Full hardware access – ARKit, CoreML, camera, GPS, sensors, biometrics.
  • Day-one support for new Apple and Google platform features.

Outcome you can expect: A polished native app that takes full advantage of each platform.

About service

Ship to iOS and Android from a single codebase using Flutter or Kotlin Multiplatform. We deliver one team, one roadmap, and one launch across both stores.

Best fit for

Ideal for products that need to launch on both stores quickly – MVPs, internal B2B tools, mid-complexity consumer apps, where development budget and timeline matter more than platform-specific UI polish.

What you get

  • Full-cycle development from discovery to App Store and Play Console release.
  • One codebase shipped to both App Store and Play Console.
  • 30–40% lower development cost than building native twice.
  • Single team, single roadmap, single launch timeline.

Outcome you can expect: A launched app on both stores, delivered faster and at lower cost than parallel native builds.

About service

Senior Kotlin, Swift, Flutter, or KMP engineers join your existing team within one week – under your management, in your sprints, on your roadmap. 

Best fit for
Ideal for product companies with in-house mobile or product teams who need to add senior expertise fast, without the hiring lag, overheads, and losing direct control over priorities and pace.

What you get

  • Senior Kotlin, Swift, Flutter, and Kotlin Multiplatform engineers.
  • Direct integration into your sprints, standups, and code review processes.
  • Flexibility to scale the team up or down as your roadmap shifts.
  • Full IP ownership – every line of code is yours from day one.

Outcome you can expect: Your hiring problem solved without the long-term cost.

About service

Modernize legacy iOS or Android codebases incrementally, without freezing your roadmap. We migrate piece by piece while keeping the app stable and shippable throughout.

Best fit for
Ideal for companies whose working app has started to slow them down – legacy code, outdated UI, missing platform features, or a tech stack that blocks new development. 

What you get

  • Code audit and modernization roadmap with effort estimates per area.
  • Migration from legacy languages (Objective-C, Java) or frameworks to modern stacks.
  • UI/UX redesign aligned with current platform standards.
  • Phased delivery that keeps the production app stable.

Outcome you can expect: A modern, maintainable app that’s faster to develop, and cheaper to operate.

About service

Keep your mobile app compatible with new iOS and Android versions, ahead of bugs, and continuously improving. 

Best fit for
Ideal for companies with a live app and no in-house mobile team – or whose original team has moved on. We pick up your codebase, run it like our own, and keep it shipping.

What you get

  • Predictable monthly retainer scaled to your app’s complexity and traffic.
  • Bug fixes, security patches, and third-party SDK upgrades on a regular cadence.
  • iOS and Android version support, including App Store and Play Console compliance.
  • Direct Slack and Jira access to the engineers maintaining your app.

Outcome you can expect: An app that stays live, compliant, and out of your team’s way.

About service

Get a complete review of your existing mobile app – covering code quality, architecture, performance, test coverage, and security.

Best fit for
Ideal for product owners, CTOs, and investors who need an objective read on a mobile app – before scaling it, acquiring it, replatforming it, or handing it to a new team.

What you get

  • Code audit covering architecture, code quality, test coverage, and tech debt.
  • Performance audit identifying crash rates, startup time, battery, and memory issues.
  • Security audit aligned with OWASP Mobile Top 10.
  • Prioritized fix list with effort estimates and a clear next-step recommendation.

Outcome you can expect: An objective picture of your app’s health, and roadmap to fix what matters.

TECHNOLOGIES WE USE

Mobile app development technologies we use

We follow two ways in building mobile apps. You can pick either native or cross-platform approach, depending on what fits your product more.

Native mobile app development

Swift
Native iOS development across Apple’s ecosystem.
Best for:
Products that depend on Apple’s ecosystem, hardware features, or platform-feel polish.
Kotlin
Native Android development across phones, tablets, and wearables.
Best for:
Android-first products or apps that rely on deep Android platform integration.

Cross-platform mobile app development

Flutter
Cross-platform development with one codebase, pixel-perfect UI.
Best for:
MVPs, B2B tools, and mid-complexity consumer apps where UI consistency matters.
Kotlin Multiplatform
Cross-platform business logic, fully native UI on each platform.
Best for:
Products that need native UI quality without writing core logic twice.

Still not sure which approach fits your product?

Native, cross-platform, or a mix? Get a senior technical opinion on what fits your product, team, and timeline – in a free 30-minute call.

Need a senior opinion on your mobile project?

CTO & lead iOS developer

Yuriy Yatseyko


Yuriy, with 10+ years of delivering engineering projects of different types (both native and cross-platform), knows what can make or break the project. Get his honest read on what fits your product in a free 30-minute call.

Book a consultation

MOBILE APPLICATION DEVELOPMENT COMPANY YOU CAN TRUST


Why choose Volpis as your custom mobile app development company

Mobile-first experience

Mobile was our founding service since 2016. We’ve shipped iOS and Android apps every year for 10+ years, through every major language and framework transition.

Full in-house team

We can cover all your needs inhouse – engineers, designers, QAs and PMs. One team, and no context lost between handoffs.

Mobile-grade security

Our practices are ISO 27001-aligned, and every project includes OWASP Mobile Top 10 compliance review as part of QA.

AI-accelerated process

We use AI to ship faster and to build smarter mobile features like on-device ML, AI-powered search, and recommendation engines.

Research-driven decisions

We start projects by understanding your users, not assuming what they need. Analysis and analytics review shape every product decision we make.

Apps proven at scale

Mobile apps we developed have grown past millions of downloads, and serve users across regulated industries. We architect for scale from day one.

Devices coverage

We build across every Apple and Google surface – phones, tablets, foldables, Apple Watch, Wear OS, Apple TV, Android TV, and Vision Pro. Mobile is more than phones.

Security
and IP Protection

  • NDA signed before cooperation

    Confidentiality starts before any development project discussion.
  • Full IP Ownership

    You retain 100% rights to all code, designs, and deliverables.
  • Secure development practices

    We follow strict coding standards to protect your data 
    and systems.

Like what you see? Let’s plan your project together

Share your project details and we’ll come back within 1 business day with a kickoff plan – team, scope, and timeline.

Showcase

Mobile application development projects

See all

The Holy Quran

RELIGION

Android BA Backend iOS Redesign UX/UI
We maintained and modernized The Holy Quran through 7+ years of partnership. Our team also shipped Apple Watch app, migrated the codebase to modern frameworks, and redesigned the experience. As a result, the App Store rating climbed from 4.3 to 4.8, with downloads surpassing 1 million.

Rand One

FLEET MANAGEMENT

Android BA iOS UX/UI
Our team built Rand One, a mobile fleet management app for Rand McNally, a maps & logistics leader in the USA since 1856. We aimed to reach the precision of GPS hardware through software alone. For this, our mobile developers used the native capabilities of the iOS and Android platforms.

My Day

WORKPLACE

Android Backend iOS UX/UI
Volpis built My Day from concept to launch, with native iOS and Android apps. Developers had to combine self-reported well-being data with real physical health metrics without overstepping employee privacy. We integrated Apple Health and Google Fit to pull existing fitness data.

Purple ConneX

CONNECTIVITY

Android BA Backend iOS UX/UI
We built Purple ConneX, a mobile app that lets users discover public Wi-Fi hotspots. We used native approaches for the UI, bringing the business logic to a shared layer with KMP. The app is active across 80,000+ venues, including McDonald’s and Walmart Canada.
Room Xpand Room Xpand

Room Xpand

PROPTECH

BA iOS UX/UI
We built Room Xpand, an iOS app that uses LiDAR sensors to scan rooms and generate 3D models and 2D floor plans in real time. Built natively in Swift, the app handles complex 3D-to-2D conversion math while keeping the interface intuitive for both professionals and casual users.

Flow MSP – Fire

PUBLIC SAFETY

Android Backend iOS UX/UI
We modernized Flow MSP Fire, a pre-incident planning app used by firefighters across 30 US states. After taking over the existing MVP, we redeveloped the native iOS and Android apps for performance under load, handling map interactions and location tracking that 7,000+ firefighters rely on.

Vera

LANDSCAPE DESIGN

BA iOS
We built Vera, an iOS landscape design app with AI-powered plant suggestions tailored to each user’s environment. Working under a tight discovery timeline and shifting budget, we scoped the MVP around the highest-value features, and validated the AR-based snapshot system.

Testimonials on mobile app development service

Software development company Client
Clarke Retzer
Director of Software,
Rand McNally
5.0

“Volpis delivered accurate work that showcased custom hardware components ahead of time, exceeding expectations. Moreover, the professional team ensured effective collaboration between teams through their high level of accountability, transparency, and genuine commitment to the project’s success.”

Adam Ricketts
Head of Product, Fleetsu
5.0

“Within 3 months of engaging Volpis we had published the first version of our mobile application and used this to assist the launch of our product into new verticals and territories.”

Talib Omer
Owner, Peace Through Understanding
5.0

“The new features received positive feedback from users. Despite initial issues, their team made significant improvements to the application. Volpis’ team is motivated and communicative. They make engagements seamless. ”

Software development company Client
James Parkes
Founder, Evexia Health International
5.0

“Though the product is not yet launched, Volpis hat met all deadlines and budget given. They have been amazing in application and communication. Moreover, the deliverables are of high quality..”

Gavin Wheeldon
5.0

“They have worked on two projects. The team was timely, responsive, and trustworthy. They committed to the timeline and budget.”

Software development company Client
Dina Lam
CEO & Founder, Joydrop
5.0

“Volpis delivered a comprehensive business requirements document and a clickable prototype that improved user satisfaction. The team’s user-research insights were thorough and actionable. Volpis used Agile methodology, communicated efficiently, and stayed on top of milestone tracking. ”

Questions & Answers

FAQ

How much does it cost to develop a mobile app?

Mobile app development cost depends on scope, integrations, and platform choice. Most projects fall into one of three brackets: discovery and validation work starts at $5,000 over 2–4 weeks; an MVP starts at $40,000 over 8–16 weeks; a full production app starts at $120,000 over 4–9 months. Real numbers come from a 30-minute call and a 72-hour proposal. See our Mobile development pricing section for details.

How long does it take to develop a mobile app?


Mobile app development timelines depend on scope and platform. A discovery phase typically runs 2–4 weeks. An MVP for one platform takes 8–16 weeks, or roughly twice that for both platforms with native development. Full production apps run 4–9 months for first release, with ongoing iteration after launch. Cross-platform approaches like Flutter or Kotlin Multiplatform compress timelines by 30–40% when they’re the right fit.

How do I choose a mobile app development company?

The right mobile development company depends on your product stage, technical complexity, and budget. Strong signals to look for: a portfolio of shipped apps in your industry, transparent pricing and timelines (not “contact us for quote”), senior engineers named on the project rather than rotating juniors, ISO 27001-aligned security practices for apps handling sensitive data, and a clear discovery phase you can pay for separately before committing to a build. Avoid agencies that won’t tell you who’s on your team, won’t share past code architecture, or quote without scoping.

Should I build native or cross-platform?

Native is the right choice when performance, hardware access, and platform feel are non-negotiable — AR, fintech, healthtech, or apps with 5+ year horizons. Cross-platform (Flutter or Kotlin Multiplatform) is the right choice when you need to ship to both stores faster, lower development cost by 30–40%, and the product doesn’t depend on deep OS integrations. We don’t have a preference; we recommend the stack that fits your product. See our approach section for details.

How to hire mobile app developers?

There are three main ways to hire mobile developers: hire in-house (slow, expensive, hardest to find senior talent), work with a freelance platform like Upwork or Toptal (fast but variable quality and no team accountability), or engage a mobile-focused development company (slower than freelance, faster than in-house, with a senior team that’s worked together). Each works for different situations. If you need senior mobile expertise within 1–2 weeks and want full team accountability, a focused agency is usually the right call.

How to outsource mobile app development?

Outsourcing mobile development works when three conditions are met: the vendor specializes in mobile (not “we do everything”), the team is in-house at the agency (not subcontracted further), and you have direct access to the engineers, not just an account manager. Ask any vendor: who specifically will be on my project, can I interview them, and do you subcontract any of the work? If the answers are vague, you’re outsourcing through layers of risk. If they’re specific, you’re hiring a team.

Do you build mobile apps for startups?

Yes — startups are one of our core buyer segments. We typically work with startups on MVP development (4–8 months, scope locked around the features that prove your hypothesis) or discovery-only engagements (2–4 weeks, fixed fee, ends with a scoped proposal you can take to any vendor). We’ve shipped apps for early-stage products like My-Day from concept to launch, and we don’t require multi-year commitments — many startup engagements start with a discovery phase and grow from there.

What is the mobile app development process?


Mobile app development for a from-scratch product, typically moves through six phases. They are discovery, design and architecture, development, quality assurance, launch, and post-launch support. The exact sequence and depth depend on the project – some skip discovery, others need three rounds of design, some launch in six weeks and others in nine months. The framework adapts to the product, not the other way around. At Volpis, we run two-week Agile sprints with weekly demos throughout development, and we treat QA as a dedicated phase before launch rather than just an afterthought.

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