Mobile App Development Company for US & European Startups

For a startup or SMB in the US or Europe, the difference between a $150/hour local agency and a proven remote team is often just the invoice — not the quality. OneSystem builds mobile apps that are already live on the App Store and Google Play, serving real users and processing real payments. Don't take our word — check the stores Our portfolio includes BarakaFin, a personal finance app with budgeting, debt tracking, and savings goals; Food-Bag, a surplus-food marketplace inspired by Europe's Too Good To Go model; Nazarshop, a fashion e-commerce app with a full admin panel; and O'ynaa, a sports venue booking app with online payments and an owner dashboard. Every one of them passed Apple and Google review — you can download and test them right now. What we build: — Cross-platform apps with Flutter — one codebase for iOS and Android, cutting budgets by up to 40%; — E-commerce and marketplace apps — catalogs, carts, payments, delivery tracking; — Fintech features — transactions, statistics, subscription billing; — Booking systems — scheduling, payments, and admin dashboards; — Backend included — API, database, admin panel, and integrations from the same team. How we work with international clients We start with a free discovery call and a fixed quote — no vague hourly billing. You get weekly demos, English communication, and hours that overlap conveniently with both EU and US schedules. After launch we handle App Store and Google Play publishing plus ongoing updates. The math is simple: Western-quality engineering at 50–70% below local agency rates. Message us on Telegram @OneSystem_uz — get a free estimate and portfolio walkthrough within 48 hours.