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Development of native and cross-platform mobile applications for iOS and Android

We create ergonomic, fast and secure mobile apps for business: from client services and mobile commerce to closed corporate tools for staff. Clean architecture, uninterrupted offline operation and guarantee of passing moderation in App Store and Google Play.

iOS (Swift) Android (Kotlin) Flutter (Dart) Offline-First Architecture Biometric Security App Store & Google Play ASO
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Solutions catalogue
100% Guarantee

Successful Release

Guaranteed passage of strict moderation in Apple App Store and Google Play Store on the first attempt.

60 FPS

Interface smoothness

Ideal ergonomics and smooth rendering without delays and gaps even on budget smartphones

99.9% Crash-Free

Code Stability

Automated testing, absence of critical errors, and integration of Crashlytics for monitoring 24/7.

100% Rights

Code Ownership

Transfer of all output repositories, application signing keys (Keystore / Certificates) to the client.

[ ENGINEERING STANDARD MOBILE ]

Why a mobile app for business should be a reliable work tool, not just a "icon on the screen"

Smartphone is the closest point of contact between your business and clients or field employees. If the app is slow to load, consumes too much battery or crashes during unstable mobile connectivity — the user immediately deletes it or switches to competitors. We build mobile products based on autonomy (Offline-First), protected processing of personal data and seamless integration with your accounting system, CRM and warehouse.

✓ We sign an official contract with fixed price and development terms
✓ Warranty SLA support 90 days after the system is put into operation
✓ 100% transfer of intellectual property and source code of the project to the client

Offline-First and synchronization

Local SQLite/Room databases and request queues allow comfortable work offline with immediate synchronization upon network recovery.

Hardware security and encryption

Saving sensitive keys and sessions in iOS Keychain / Android Keystore, biometric authentication Face ID / Fingerprint and SSL Pinning.

Deep integration with the backend

Direct exchange via REST/GraphQL or WebSockets with CRM, ERP (MASTER, Dilovod), Checkbox, payment gateways Apple Pay / Google Pay.

Modular Clean Architecture

Clear separation of logic according to MVVM/BLoC patterns ensures simple addition of new features without the risk of breaking already working functionality.

[ 7 Categories of Solutions ]

Specialized Solution Areas

Choose the technical implementation format for your tasks.

[ 01 ] Apple Ecosystem

Native development of applications for iOS (Swift) ↗

Premium mobile solutions for iPhone, iPad and Apple Watch in Swift and modern frameworks SwiftUI / UIKit with full support of all Apple hardware features.

What is included in the implementation:
✓ Development for the latest versions of iOS while adhering to Apple Human Interface Guidelines
✓ Integration Apple Pay, Face ID / Touch ID, Push-notifications through APNs
✓ Local data storage in Core Data / SwiftData with keychain encryption
✓ Preparation and official release in Apple App Store with full moderation support
Swift / SwiftUI / Core Data / APNs / StoreKit
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[ 02 ] Google Android OS

Native app development for Android (Kotlin) ↗

Fast and stable applications on modern Kotlin language under thousands of Android smartphone and tablet models with flawless adaptation under any screen diagonals.

What is included in the implementation:
✓ Modern declarative interface on Jetpack Compose and Material Design 3
✓ Reliable operation in background mode (WorkManager) without system blocking
✓ Integration of Google Pay, Biometric Prompt and Firebase FCM Notifications
✓ Optimization of APK/AAB size and successful publication in Google Play Store
Kotlin / Jetpack Compose / Coroutines / Room / Firebase
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[ 03 ] Multi-Platform Cost-Efficiency

Cross-platform development of mobile applications ↗

Creation of a single code base that works on iOS and Android simultaneously. Reduces development costs by 35–45% and cuts product market release time in half.

What is included in the implementation:
✓ Single exit code for iOS and Android without double costs for the team
✓ Speed of operation and visual quality indistinguishable from native applications
✓ Shared business logic, data model, and centralized testing
✓ Synchronous deployment of updates immediately on two platform storefronts
Flutter / Dart / Crossplatform Engine / REST API
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[ 04 ] Google Flutter Framework

Development of mobile apps on Flutter ↗

Development on a leading global framework from Google. Own rendering engine Impeller guarantees stable 60–120 FPS and flawless pixel accuracy of the interface.

What is included in the implementation:
✓ Identical response and behavior of UI on smartphones of any manufacturer
✓ Predicted architecture based on BLoC / Riverpod for complex processes
✓ Native interaction with camera, GPS, Bluetooth and NFC through platform channels
✓ Possibility of easy code expansion to web version or desktop
Flutter 3+ / Dart / BLoC / Hive / Platform Channels
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[ 05 ] B2B & Internal Operations

Corporate applications for business and personnel ↗

Closed mobile workstations for couriers, freight forwarders, warehouse workers, service engineers and sales representatives with integration into the accounting system.

What is included in the implementation:
✓ Scanning barcodes and QR codes with the camera or built-in TZD scanners
✓ Work with invoices, orders, route slips and photo reports
✓ Full offline mode for employees in areas with no connectivity
✓ Closed corporate deployment via MDM or private certificates
Offline Sync / QR & Barcode Engine / MDM Distribution
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[ 06 ] Store Release & Optimization

Publication in App Store / Google Play and ASO ↗

Official turnkey moderation process: developer account setup, filling tax and legal forms, preparing screenshots and text ASO for search.

What is included in the implementation:
✓ Support during organization verification in Apple Developer Program and Google Play Console
✓ Preparation of screenshots of all required diagonal views, promo videos, and icons
✓ Text ASO: Selection of Keywords, Writing Titles, Subtitles and Descriptions
✓ Compliance with confidentiality requirements (App Privacy Report, Data Safety)
App Store Connect / Play Console / App Privacy / ASO Core
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[ 07 ] SLA Maintenance & Updates

Technical support and application modernization ↗

Regular updating of applications for new annual versions of iOS and Android, optimization of performance, error monitoring, implementation of new features according to SLA-regulation.

What is included in the implementation:
✓ Adapting code to annual updates of iOS and Android and requirements of SDK
✓ Monitoring of errors in mode 24/7 through Firebase Crashlytics and Sentry
✓ Prompt bug fixing and release of hotfixes with guaranteed response time
✓ Monthly report on user activity, crash rate, and stability
Sentry / Firebase Crashlytics / Fastlane / SLA 99.9%
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[TECHNOLOGICAL STACK]

Engineering Stack and Architectural Standards

We do not use bulky constructors or ready-made themes. Development is carried out according to the principles of clean architecture and proven corporate standards.

Native iOS & Android

Maximum speed, direct access to Neural Engine chips and sensors

  • Swift 5.9+
  • SwiftUI & UIKit
  • Kotlin 2.0+
  • Jetpack Compose
  • Coroutines & Flow
  • Core Data / Room

Flutter & Crossplatform

Unique fast codebase with its own rendering engine Impeller

  • Flutter 3.x
  • Dart
  • BLoC & Riverpod
  • Platform Channels
  • Hive / Isar DB
  • Retrofit & Dio

Backend, Cloud & Data

Reliable data transmission and immediate synchronization of data under any conditions

  • RESTful API & JSON
  • WebSockets Real-Time
  • gRPC & Protobuf
  • Firebase Cloud Messaging
  • OAuth2 / JWT Auth
  • PostgreSQL / Redis

CI/CD, Release & Security

Automated collection, release to stores and continuous data protection

  • Fastlane Automation
  • GitHub Actions CI/CD
  • App Store Connect API
  • Google Play Developer API
  • Sentry & Crashlytics
  • OWASP Mobile Security
[ METHODOLOGY AND STAGES ]

How We Implement Projects from Scratch

Transparent and controlled process without missed deadlines and unexpected budget expansions.

01

Analysis of business logic and User Journey

We explore usage scenarios, design the screen map (User Flow), compose the technical specification and fix requirements to API.

02

UX/UI design and clickable prototype

We create an ergonomic interface in Figma according to iOS and Android guidelines. We present an interactive prototype before starting programming.

03

Engineering development in sprints

We write clean code, integrate backend and third-party services. Every 2 weeks we provide a working test build through TestFlight and Google Internal Testing.

04

Stress testing on real smartphones

We check the app's operation on different OS versions, screen resolutions, under loss of connection and at low battery charge.

05

Publication in stores and 90 days warranty

We are conducting the app through App Store and Google Play moderation, transferring all source files to the client and ensuring 90 days of warranty SLA.

Our Clients

Companies that trust ALL IT Agency for development, scaling, and security of their digital solutions

Partner Case 6
Partner Case 5
DIM Service
Partner Case 11
Meregi Group
Partner Enterprise
Valikhnovski Surgery Institute
Wizeclub
TOV Zagin Alpha
Partner Case 6
Partner Case 5
DIM Service
Partner Case 11
Meregi Group
Partner Enterprise
Valikhnovski Surgery Institute
Wizeclub
TOV Zagin Alpha
[ FREQUENT QUESTIONS ]

Answers to questions from the client

Key details regarding terms, warranties, transfer of source code and the development process.

If your project requires maximum usage of complex hardware equipment (for example, heavy 3D, complex audio processing algorithms or Bluetooth devices) — the optimal approach is native (Swift/Kotlin). For 85% commercial applications (E-commerce, B2B cabinets, delivery, corporate services, booking) Flutter is the ideal choice: it saves up to 40% budget and doubles the release speed without losing smoothness or visual quality.
Moderation of the first collection in Apple usually takes from 24 to 48 hours, in Google Play — from 3 to 7 working days. We pre-test the app for compliance with all technical, legal and security requirements of Apple Guideline and Google Developer Policy, which guarantees release without deviations and penalty delays.
Yes. We fully accompany the account registration process specifically for your legal entity or individual entrepreneur (including obtaining an international D-U-N-S number for Apple), so that you are the sole legal owner of the applications in the stores.
Yes. We design applications according to the Offline-First principle: data is stored in an encrypted local database on the device, the user can view information or place orders offline, and when the network is available, the application automatically synchronizes changes with the server through a queue of requests.
100% rights of intellectual property, source code in Git repositories, graphic resources in Figma and cryptographic signing keys of application (Keystore / Certificates) transfer to your full ownership upon official contract.
After launch we provide 90 days of free warranty support. Then we connect monthly SLA support for planned code adaptation to annual releases of new iOS/Android versions and for the timely release of new features.

Solution needed according to specific requirements Your industry?

Find out how we adapt and deploy IT infrastructure and services for government agencies, healthcare, retail, HoReCa, logistics and construction sectors.

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Planning to develop a mobile application?

Describe your idea or task. Our engineers will analyze the requirements, select the optimal stack and prepare a transparent cost estimate with implementation timelines.

Confidentiality

Official NDA contract for system audit

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