Mobile App Development Services — iOS, Android

9+Years in business

80+Senior engineers on staff

120+Projects delivered

71Client NPS

GDPR-aligned · ISO 27001 ready · SOC 2 Type II in progress · HIPAA-capable · CCPA-acknowledged · CET workday with 9 AM–1 PM ET overlap

We deliver the full mobile lifecycle: discovery, UX, native iOS (Swift, SwiftUI) and native Android (Kotlin, Jetpack Compose), and cross-platform builds in Flutter and React Native when a shared codebase serves the roadmap better. Our teams ship App Store and Google Play submission packages — code signing, TestFlight, internal testing tracks, store metadata and review handling — then stay on for post-launch support: crash triage, store-release cadence, performance work and feature growth. Engagements are anchored from Yerevan with daily 9 AM–1 PM ET overlap. See it in practice in our Building JoyJet case study.

What our mobile app development services include

Store-ready from day one

Every release is checked against the latest Apple and Google guidelines, including DSA, EU DMA and tracking transparency, so first-submission rejections are rare.

60 fps where it matters

We profile, not guess. Animations, lists and camera flows hit 60 fps on mid-range devices, not just on the latest flagships in the office.

Privacy-first by design

Minimal SDKs, consent-gated tracking, certificate pinning and at-rest encryption. Privacy nutrition labels and Data Safety forms maintained alongside code.

Backend included

Mobile-first APIs, push, deep links and offline sync are designed and built by the same team, so your app is never blocked on a separate backend group.

On-device AI

CoreML and on-device LLMs for vision, voice and personalization, with sensible cloud fallbacks. Latency stays low, data stays on the phone where possible.

Crash-free SLO

99.5 percent crash-free user sessions as a hard SLO. Sentry, Crashlytics and structured logs are wired in before the first internal beta.

Our iOS, Android and cross-platform technology stack

Swift SwiftUI Kotlin Jetpack Compose React Native Flutter Expo Node.js .NET 8 Firebase Supabase GraphQL CoreML TensorFlow Lite Fastlane Sentry

How we deliver mobile apps end to end

01
Discovery

We audit user flows, device matrix, store policies and analytics goals, then agree on success metrics and a release plan for both stores.
02
Design

Native or cross-platform, UI patterns per OS, accessibility and offline behavior are decided up front and documented before the first commit.
03
Build

Two-week sprints with TestFlight and Play internal builds at every demo. Fastlane CI, signed artifacts and store metadata version-controlled.
04
Run

Phased rollouts, crash and ANR tracking, store review monitoring and a backlog dedicated to platform changes from Apple and Google.

Engagement models

Fixed Price

For MVP launches with crisp scope, defined design and a single store as primary target. Discovery comes first, then a fixed plan.

Time & Materials

For evolving consumer apps where weekly experiments are the norm. Senior squad, weekly demos, capacity reviewed monthly.

Dedicated Team

A long-term iOS, Android and backend squad embedded in your product organization, owning store releases end to end.

What a mobile app costs with YuSMP

Indicative ranges from our own engagements. Scope, integrations and compliance move the number more than code does — we confirm a fixed figure after discovery.

MVP

from 60k EUR

A focused iOS or Android MVP — core flows, one store, ready for real users and a first funding round. Mobile MVP development →

Cross-platform app

90k–180k EUR

One React Native or Flutter codebase across iOS and Android, with mobile backend, payments and analytics wired in.

Full platform

from 250k EUR

A polished consumer product (typically 180k–350k EUR) — native performance, multi-region compliance and post-launch support.

Maintenance runs 15–25% of build per year. Full breakdown in our 2026 mobile app cost guide.

Selected mobile work

Real US & EU-aligned mobile products we have shipped end-to-end — iOS, Android and cross-platform.

Social Media · Consumer Tech

JoyJet

Production social platform — App Store + Google Play, live across the US and EU — with geo Radar, encrypted messaging and a virtual economy.

2022–present View case

Mobility · Ridesharing

Convenient Taxi Aggregator

Three-app ride-hailing platform — driver, passenger, dispatcher — with real-time GPS, document verification, dual cash/card payments.

2023 View case

Mobility · Micromobility

Scooter Sharing

E-scooter sharing app with live map, QR unlock, and ride wallet for iOS and Android — 5,000+ riders, built for US & EU rollouts.

2023 View case

View all case studies →

Industries we build mobile for

Mobile is the entry point for most consumer and B2B products across US & EU markets. We pair industry-specific compliance with App Store-grade quality.

FinTech

PCI DSS, PSD2 SCA, MiCA-aware wallets, US money-transmitter-friendly KYC flows for US & EU retail and pro users.

Mobile fintech →

HealthTech

GDPR + HIPAA + MDR-aware patient apps, telemedicine, FHIR-aligned records and consent management.

Mobile healthtech →

E-commerce & Retail

Native shopping apps with on-device search, push commerce and US & EU consumer-law-aligned checkout.

Mobile commerce →

Logistics & Mobility

Driver and dispatcher apps with offline-first, GPS-grade navigation and ELD/eFTI integrations.

Mobile logistics →

US & EU mobile compliance, by default

Mobile apps live under stricter rules in the EU and a fragmented patchwork in the US. We bake the relevant frameworks into delivery, not into a final-week checklist.

GDPR + CCPA & consent

Region-locked analytics by default (EU-only for EU traffic, US-region for US traffic). Native consent dialogs, IDFA and AAID gated until granted, signed DPAs for every third-party SDK in the bundle. CCPA / CPRA opt-out flows for US users.

App Store, Play Store & DMA

App Tracking Transparency, Privacy Nutrition Labels and Data Safety forms maintained alongside code. EU Digital Markets Act sideloading and alternative billing handled where applicable.

AI Act (EU) + NIST AI RMF (US) — on-device ML risk classification

On-device CoreML and TensorFlow Lite where data sensitivity demands it. Risk classification, transparency notices and provider duties tracked under both the EU AI Act and the NIST AI Risk Management Framework, with awareness of US state laws (Colorado AI Act 2026, NYC AEDT).

Payments & PCI DSS

Apple Pay, Google Pay and card-on-file flows scoped under PCI DSS with tokenization, attestation and runtime app self-protection.

Accessibility (EAA + ADA)

WCAG 2.2 AA on mobile, VoiceOver and TalkBack tested as part of the release checklist. EU Accessibility Act 2025 and US ADA / Section 508 are part of every consumer-facing build.

Children & sensitive data

Age-gating, parental consent flows and stricter retention for under-16 audiences. Aligned with both Apple and Google kids-category guidelines, plus COPPA (US) and GDPR-K (EU).

Why US & EU teams pick YuSMP

GDPR-aligned · ISO 27001 ready · SOC 2 Type II in progress · HIPAA-capable · CCPA-acknowledged

Aligned across CET & ET time zones

Daily standups, same-day reviews, joint store release calls. CET workday with East-Coast US overlap (9 AM–1 PM ET). Your release manager and our team share one calendar.

Senior-only engineering

Engineers with multiple shipped apps under their belt. We do not learn iOS or Android on your dime.

GDPR + CCPA & ISO 27001 ready

Region-locked data flows (EU data residency · US options on request), signed DPAs for every SDK, and ISO 27001 controls on the backend with SOC 2 Type II in progress. PCI DSS available for in-app payments; HIPAA-capable for health.

For wallet, BNPL and card-on-file flows we operate inside PCI DSS scope and align with your acquirer on tokenization, attestation and runtime protection.

What clients say

Our iOS and Android apps had diverged over years of separate development. YuSMP rebuilt a single unified solution with live camera feeds, smart-home device control, and role-based multi-user access. Zero critical defects in the first six months post-launch.

Patrick O'Brien, CTO, Grom SecurityView case →

Retail apps need to be fast and fault-tolerant with real-time inventory sync to offline stores. YuSMP built native Swift and Kotlin apps with ElasticSearch search, 1C ERP integration, and a two-tap checkout our customers genuinely love.

Laura Bennett, E-commerce Director, MalishView case →

Frequently asked questions

Native iOS and Android, or React Native and Flutter?

If your app needs deep platform features, sustained 60 fps animations or hardware integrations, we go native with Swift and Kotlin. For content-heavy apps with shared business logic, React Native or Flutter halve the cost without hurting UX.

How long does App Store and Google Play review usually take?

Plan for 24 to 72 hours per submission. We pre-flight every release against current store guidelines, including DSA, EU Digital Markets Act and tracking transparency rules, so first-time rejections are rare.

Can you maintain an existing app while we plan a rewrite?

Yes. We routinely take over legacy iOS or Android apps, stabilize them, and run a parallel rewrite. Users keep getting fixes while the new build matures behind a feature flag and a phased rollout.

How do you handle GDPR consent on mobile?

We use native consent dialogs, IDFA and AAID handling per platform rules, region-locked analytics (EU-only for EU traffic, US-region for US traffic), and no SDKs that phone home before consent. DPAs are signed for every third-party SDK in the bundle. CCPA / CPRA opt-out flows for US users.

What does end-to-end mobile pricing look like?

A cross-platform MVP for iOS and Android starts around 90,000 EUR. A polished consumer app with backend, payments and analytics typically lands between 180,000 and 350,000 EUR depending on scope and store readiness.

Can you build on-device AI features into our app?

Yes. On-device AI (Apple Intelligence, Gemini Nano, Core ML, LiteRT) lets us add private, offline, instant features with no per-request cost, escalating to the cloud only when a request genuinely needs it. See our 2026 guide to on-device AI in mobile apps.

How long does it take to build a mobile app?

Most mobile apps take 3 to 6 months from discovery to launch — a simple app 2 to 3 months, a complex one 6 to 12+. See our stage-by-stage mobile app development timeline.

How much does it cost to maintain a mobile app?

Budget 15 to 25% of the initial build cost per year, with the first year usually higher as the app stabilises. Full breakdown in our guide to mobile app maintenance cost in 2026.

Native or cross-platform — which should we choose?

Cross-platform (React Native, Flutter, Kotlin Multiplatform) typically saves 30 to 45% of combined build cost with one codebase; native (Swift, Kotlin) wins for performance-critical and deeply integrated apps. We help you decide in native vs cross-platform app development.

From the blog

Practical guides on mobile app development, costs, and platform strategy for 2026.

How much does it cost to build a mobile app in 2026? (US & EU benchmarks)

Get a proposal

Share a few details and a senior consultant will reply within one business day.

Prefer to talk directly? ☎ Call +374 44 871 811 ✉ sales@yusmpgroup.com

From our blog

Deeper reading on building, costing and securing mobile apps for US & EU teams.

Native vs cross-platform app development 2026