Mobile App Development in Khmelnytskyi
I am Oleksandr Filiuk, 15+ years and 130+ projects. I build iOS and Android apps on Flutter, React Native, Swift and Kotlin for Khmelnytskyi retail, 7th Kilometer market wholesalers and Podillia agri companies with Firebase, AWS and Google Cloud integrations.
25+Mobile apps launched
15+Years of experience
4.8Average App Store rating
100+Satisfied clients worldwide
Leave a request
Tell me about your app idea, target audience, and platforms (iOS, Android, or both).
Free consultation
We'll discuss features, tech stack, timeline, and App Store / Google Play launch strategy.
Get your app
A ready mobile app published in stores with analytics and push notifications configured.
Types of Mobile Apps
I develop mobile apps for any platform and business need
🍎
iOS App (Swift)
I build native iOS applications in Swift with flawless UX and full Apple ecosystem integration.
🤖
Android App (Kotlin)
I create native Android applications in Kotlin with Material Design optimized for diverse devices.
🔄
Cross-platform App (React Native)
I develop cross-platform apps with React Native — one codebase for iOS and Android with native performance.
🌐
PWA App
I build Progressive Web Apps that work offline, install like native apps, and load instantly.
🏢
Enterprise App
I design and develop complex enterprise mobile solutions to automate business processes.
🚀
MVP App
I rapidly build minimum viable products to validate business ideas and attract investment.
Work Process
1
Analysis & Discovery
I research the target audience, competitors, and business requirements. I form a technical specification and define key app features.
2
UX Design
I create wireframes, user flows, and interactive prototypes. I test usability with real users.
3
UI Design
I develop visual design following platform guidelines. I create a design system and all app screens.
4
Development
I code the app with clean architecture, write tests, and integrate with backend and APIs.
5
Testing & QA
I conduct comprehensive testing on various devices, fix bugs, and optimize performance.
6
Publishing & Support
I publish the app to stores, set up analytics, and provide ongoing support and updates.
Pricing
Choose the optimal package for your project
Starter
MVP App
10 screens
$1000$1200What's included:
- Design and development of 10 screens
- iOS or Android
- UI Kit components
- Interactive prototype
App ready in 7 days
Basic
Standard App
30 screens
$3000$3600What's included:
- Design and development of 30 screens
- iOS or Android
- UI Kit components
- Interactive prototype
- UX research
App ready in 3 weeks
Business
Pro App
50 screens
$5000$6000What's included:
- Design and development of 50 screens
- iOS or Android
- Design system
- Interactive prototype
- UX research
- Animations and micro-interactions
App ready in 1 month
Premium
Premium App
50+ screens
$5000+$6000+What's included:
- Design and development of 50+ screens
- iOS or Android
- Full design system
- In-depth UX research
- UX strategy and User Flow
- Interactive prototype
- Animations and micro-interactions
- Usability testing
- Personal project manager
- Priority support after delivery
Individual timelines
Cost will be calculated individually depending on your request.
Frequently Asked Questions
Answers to the most popular questions
It depends on goals. Flutter — fast cross-platform development with a single codebase for iOS and Android, ideal for MVPs and mid-size products. React Native — a good choice if the team already knows React and tight web integration is needed. Swift and Kotlin — native development, mandatory for apps with intensive camera, AR, graphics or complex OS integration. I work with all four stacks and help choose the optimal one at the audit stage. Details at /services/mobile-development.
MVP on Flutter or React Native — 8-12 weeks and the equivalent of a small business starter budget. A mid-size product with backend, admin panel and 2-3 integrations — 4-6 months. Complex B2B platforms with offline mode, 1C/BAS integration, multi-role users — 6-12 months. Native apps on Swift and Kotlin are usually 1.5-2 times more expensive than cross-platform. The exact figure I provide after the technical specification and integration estimate.
Yes. For Khmelnytskyi retail chains I build B2C apps: product catalog, loyalty program, push notifications about promotions via Firebase, RetailCRM and Bitrix24 integration, payment via LiqPay and Apple Pay/Google Pay, delivery with tracking, reviews and support chat. User behavior analytics — Firebase Analytics and AppsFlyer for ad campaign attribution. App Store and Google Play release I handle myself together with marketing material preparation.
Yes, and it is one of my core focus areas. For wholesalers of the 7th Kilometer textile market I develop B2B apps: fabric catalog with photos and specs, price lists by buyer segments, mobile order placement, 1C/BAS integration for stock and document sync, offline mode for sales reps. More on the ERP side for wholesalers at /locations/khmelnytskyi/crm-erp-saas.
Yes. For agricultural companies of Khmelnytskyi region I develop mobile solutions: field work accounting with GPS tagging, photos and execution marks, agronomist checklists, equipment repair requests, photo reports on pests and plant diseases with ML recognition, fuel and truck tracking. Backend on Node.js + PostgreSQL with PostGIS, integration with the client's ERP. Works offline in the field and syncs when the network appears.
All data is encrypted in transit (TLS 1.3) and at rest (AES-256). Authentication via OAuth 2.0 with biometrics — Touch ID, Face ID or Android Biometric. For B2B apps I add SSO via Google Workspace or Microsoft 365. Sensitive data is not stored in local storage but kept in Keychain (iOS) and EncryptedSharedPreferences (Android). The backend is protected by rate limiting, WAF on AWS and anomaly monitoring. I comply with GDPR and Ukrainian law.
Yes, mandatory. Push notifications go through Firebase Cloud Messaging for Android and APNs for iOS with audience segmentation by behavior. Analytics — Firebase Analytics, Mixpanel or Amplitude depending on depth needed. Crashlytics for tracking errors in production. A/B tests via Firebase Remote Config for optimizing key screens and conversions. Everything is set up in dashboards for the client's marketing team.
Partially yes. Content, prices, banners and configuration I store on the backend or in Firebase Remote Config — these update instantly without a release. Changes in business logic and UI require publishing a new version in App Store and Google Play. For React Native and Flutter there are CodePush and Shorebird technologies that allow updating JavaScript or Dart code without a release, but with limitations under Apple and Google rules. I help design the architecture so that maximum changes go through the backend.
For Khmelnytskyi IT Cluster members and KhNU and PDU graduates I deliver mobile MVPs for Ukrainian and European markets in 8-12 weeks. I include UX research, prototype, implementation on Flutter or React Native, backend on Node.js + PostgreSQL, store publication, marketing materials. I often take the technical partner role for 6 months until the client team grows into independent support. More at /services/mobile-development.
I take care of preparing Apple Developer and Google Play Developer accounts if they are not yet in place. I prepare screenshots, descriptions in Ukrainian and English, preview videos, and configure ASO for store search optimization. Google Play publication takes 1-3 days, App Store — 1-7 days depending on moderator load. In case of Apple rejections I quickly resolve issues — over 15+ years I have built up practice for passing the toughest reviews.
Yes. Apple and Google release new OS versions yearly with new APIs and requirements. I provide SLA support for my clients: I test apps on iOS and Android betas, update SDKs, fix breakages and add new capabilities (Live Activities, Widgets, Material You, Dynamic Color). This is included in the support package or paid separately at a fixed rate. Thanks to this, my clients' apps remain relevant for years and do not disappear from the stores.
Besides mobile development, I build CRM, ERP and SaaS platforms on Next.js, Node.js, PostgreSQL with 1C, BAS, Bitrix24, RetailCRM integration — details at /locations/khmelnytskyi/crm-erp-saas. I also build corporate websites, eCommerce platforms, marketplace integrations and marketing automation. The full list of services is at /services/mobile-development and in the site services section.
Why choose me?
Comparison with other options
| Me | Other agencies | |
|---|---|---|
| Platforms | iOS (Swift), Android (Kotlin), Flutter, React Native | Single platform or template hybrids |
| 1C/BAS and CRM integration | Ready connectors for wholesalers and retailers | No integrations, CSV export |
| Backend | Node.js + PostgreSQL + GraphQL on AWS/GCP | Firebase Realtime DB without scaling |
| UX and design | Research + prototype + iOS HIG + Material 3 | Template UI kits without adaptation |
| Post-release support | SLA, updates for new OS, analytics | Code handover without maintenance |
Mobile App Development Khmelnytskyi — Oleksandr Filiuk
Why Khmelnytskyi business needs custom mobile apps
Khmelnytskyi is a city of about 270,000 residents on the banks of the Southern Bug, the historic and business center of Podillia. It hosts a unique combination of segments: thousands of downtown retailers and cafes, wholesalers of the 7th Kilometer textile market, instrument-making and food enterprises, and farms of the Podillia Upland. All of them face the fact that customers and employees use smartphones daily as the primary channel of interaction. Mobile apps have long stopped being a marketing toy — they have become a mandatory part of business operations.
I am Oleksandr Filiuk, and over 15+ years I have delivered 130+ projects, a significant share of them mobile apps on Flutter, React Native, Swift and Kotlin. In Khmelnytskyi I work with companies of Hrechany and Ruzhychna districts, residents of the Khmelnytskyi IT Cluster, KhNU and PDU graduates. In this article I explain how to choose between cross-platform and native development, how to integrate the app with 1C, BAS and CRM, and why for serious products a Node.js + PostgreSQL backend and AWS or Google Cloud infrastructure are critical.
Cross-platform vs native: Flutter, React Native, Swift, Kotlin
The first decision at project start is choosing the stack. Flutter by Google lets you create apps for iOS and Android simultaneously from a single Dart codebase with native performance and smooth animation. React Native by Meta does the same on JavaScript/TypeScript and is ideal for teams already running web frontends on React. Both stacks reduce development time by 30-40% compared to native and are used for the majority of B2C and B2B apps.
However, there are cases where exclusively native development is needed. Swift for iOS and Kotlin for Android are mandatory if the app intensively uses the camera, AR (ARKit, ARCore), deeply integrates with the OS (HealthKit, Google Fit, widgets, Live Activities, Wear OS), uses complex graphics or requires maximum energy efficiency. I work with all four stacks and at the audit stage help choose the optimal path based on your goals, budget and timelines.
Backend for mobile apps: Node.js, PostgreSQL, GraphQL, Firebase
A mobile app is just the tip of the iceberg. 70% of real work falls on the backend: API, database, authorization, push notifications, analytics, admin panel. I build backends on Node.js (Express or NestJS) with PostgreSQL as the main database and GraphQL API for flexible data work from mobile clients. This lets the app request exactly the fields needed and saves user traffic.
Infrastructure runs on AWS or Google Cloud with Docker containerization and Kubernetes orchestration or managed services (ECS Fargate, Cloud Run). Push notifications — Firebase Cloud Messaging for Android and APNs for iOS. Behavior analytics — Firebase Analytics or Mixpanel, error tracking — Crashlytics and Sentry, A/B tests — Firebase Remote Config. I use Strapi as headless CMS when the app needs convenient content management for the marketing team.
B2C apps for retail and B2B tools for wholesalers
The most popular direction in Khmelnytskyi is B2C apps for retail chains: grocery stores, pharmacies, cafes, beauty salons. Standard feature set: catalog, loyalty program with QR card, push notifications about promotions, RetailCRM or Bitrix24 integration, payment via LiqPay and Apple Pay/Google Pay, delivery with tracking, reviews and support chat. Analytics — Firebase Analytics and AppsFlyer for ad campaign attribution in Facebook Ads and Google Ads.
A separate and very specific direction is B2B apps for wholesalers of the 7th Kilometer textile market. Important here are: fabric catalog with photos, specs and meterage, price lists by buyer segments (retail, wholesale, chains), mobile order placement, 1C/BAS integration for stock and sales document sync, offline mode for sales reps working in places without stable internet. Such architecture uses a local SQLite or Hive database in Flutter and syncs with the server when the network appears.
Agritech apps for the Podillia agri sector
The Podillia agri sector is one of the most promising mobile development directions in the region. For agricultural companies of Khmelnytskyi region I develop agritech apps: field work accounting with GPS time and place tagging, photos and execution marks, agronomist checklists, equipment repair requests with photo reports, pest and plant disease recognition through ML models (TensorFlow Lite, Core ML), fuel and truck tracking with GPS trackers.
The backend of such apps is Node.js + PostgreSQL with the PostGIS extension for working with field geometry, integration with the client's ERP (more on ERP at /locations/khmelnytskyi/crm-erp-saas), satellite data from Sentinel Hub or Planet, local-level weather stations. Everything works offline in the field and syncs when the network appears. This reduces manual accounting errors, increases yields and cuts fuel and agrochemical costs.
How to order mobile development in Khmelnytskyi
Every project starts with a free consultation where we discuss your business goals, target audience, key use scenarios. Next is UX research, a Figma prototype, technical specification with stack choice (Flutter, React Native, Swift, Kotlin), backend (Node.js, PostgreSQL, GraphQL), integrations (Firebase, AWS, Google Cloud, 1C, BAS, Bitrix24, RetailCRM, Salesforce, Pipedrive, HubSpot) and budget. Development runs in two-week sprints with demo builds via TestFlight (iOS) and Google Play internal track (Android). The MVP releases in 8-12 weeks, the full product in 4-6 months. App Store and Google Play publication I handle myself together with ASO optimization and marketing materials. After release I provide SLA support, updates for new iOS and Android versions, user behavior analytics and iterative improvements based on data. Ready to discuss your project — details at /services/mobile-development.