30+Apps shipped to stores
4.8★Healthcare app rating
2–4moTypical launch window
Smartphone with a mobile app open, photographed on a developer's desk
Flutter-first
iOS + Android, senior engineers only
Why clients choose us

Six criteria that separate a great mobile partner from a vendor

Senior-only mobile engineers

Every mobile engineer has shipped apps that live in the stores — not just worked on prototypes. Our mobile team averages 9 years of experience and has handled App Store review rejections, OS migration sprints and production crashes under real user load.

Flutter-first with native modules where it counts

We default to Flutter for speed, visual consistency and a single codebase to maintain. Where a native module is the right call — hardware peripherals, ARKit, health sensors — we write it. You get the cost efficiency of one codebase without sacrificing platform-specific capability.

Full store delivery, App Store and Play Store

Submission, review, metadata optimisation, screenshot sets, release notes and re-submission if the first review bounces — all included. We have shipped to both stores dozens of times and know exactly which details reviewers flag.

Design-to-launch in a single team

UI/UX, mobile development, backend integration and store submission handled by one coordinated team. No handoff friction between a design agency and a dev shop. One backlog, one sprint cadence, one team accountable for the outcome.

Post-launch support and SLAs

iOS major releases, Android API deprecations, third-party SDK breaking changes — these arrive whether you are ready or not. Our post-launch plans cover OS compatibility updates, performance monitoring and an SLA for production incidents so you are never exposed.

Transparent pricing — fixed-scope or team-based

Fixed-price contracts for well-defined MVPs. Team-based monthly engagements for iterative products. Both options come with open-book estimates: you see the breakdown by phase, by role, and by risk buffer before you commit.

Explore by platform

Deep expertise across every mobile platform

This page answers why you should choose UP2DATE. For capability deep-dives and platform-specific details, explore below.

Technology stack

Flutter-first, backed by native expertise and a full backend

Flutter and Dart are our primary mobile layer. Swift and Kotlin for native modules. Firebase for real-time data and push. App Store and Play Store delivery fully managed — and the same team owns the .NET backend and Azure or AWS cloud behind the app.

FlutterDartSwiftKotlinFirebaseApp Store / Play

We are a Flutter shop by conviction, not by default. For projects where React Native or fully native is the better call, we say so — and staff accordingly. Technology choice follows your product requirements, not our convenience.

FAQ

Frequently asked questions

How much does it cost to build a mobile app?

A focused consumer MVP — core feature set, auth, two or three key screens and store submission — typically runs €25k–70k. A full product with multiple user roles, a custom backend, third-party integrations and post-launch support is €70k–200k+. We provide fixed-price proposals for well-scoped MVPs and time-and-materials for iterative builds. A free 30-minute call gives you a first-cut range without any commitment.

How long does a mobile app take to launch?

A focused MVP reaches both stores in two to four months. More complex apps with a custom backend, complex data models or regulatory requirements (HIPAA, medical device) take four to eight months. We run weekly demos from sprint one so you can adjust scope based on what you see rather than waiting for a big reveal. App Store and Play Store review adds one to two weeks to any timeline.

Native or cross-platform — how do we choose?

Cross-platform (Flutter) is the right default for most products: one codebase, guaranteed feature parity, lower cost, faster iteration. Go native when you need deep platform integration that Flutter cannot express cleanly — complex ARKit scenes, CarPlay, Watch OS features, or a heavily custom rendering pipeline. For most B2C and B2B apps, Flutter delivers a native-quality experience at 60% of the cost. We run a 30-minute technical alignment session with you before recommending anything.

What happens after launch — updates, new OS releases?

Apple and Google release major OS updates annually, and each one can break things without warning. Our post-launch plans cover compatibility testing and fixes within 30 days of any major OS release. Beyond that, we offer sprint-based feature evolution or a monthly retainer covering monitoring, dependency updates and a guaranteed response SLA for production incidents.

What if Apple or Google rejects the app?

Rejections happen — even to experienced teams. We include re-submission in our store delivery process at no extra cost. We know the most common rejection patterns (privacy policy gaps, in-app purchase flows, data collection disclosures) and design against them upfront. If a review reveals a fundamental product concern, we document it, recommend a fix and re-submit. We have never had a permanent rejection on a client app.

Fintech transfer app for Smith & SmithFintech
Case study

Fintech transfer app for Smith & Smith

Native iOS & Android apps for international money transfers — bank-grade encryption, biometric auth and real-time tracking. Digital adoption rose 85% with zero security incidents.

+85%
digital adoption
0
security incidents
6 mo
to launch
Read the case study

Looking for a mobile app development company?

Book a free 30-minute call with a senior mobile engineer — leave with a platform recommendation, a realistic estimate and a clear path to the stores.

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