Cross-platform mobile & frontendThessaloniki, Greece
Startups and businesses partner with GrapeBytes to launch fast, scalable, high-performance mobile apps, web apps and sites, without the development headaches.
- +iOS, Android & Web (React)
- +Free 30-min strategy call
- +100% code ownership
Built with a modern, battle-tested toolkit
Typical app development is plagued by miscommunication and unstable code. We operate as your dedicated technical partners.
- 01The Pain
Slow communication & missed deadlines with offshore freelancers.
The GrapeBytes WayDirect contact with senior developers & strict weekly sprint releases.
- 02The Pain
Unstable, crash-prone apps that cannot scale past 10,000 users.
The GrapeBytes WayNative-grade architectures built with automated testing & clean code.
- 03The Pain
Hidden costs & runaway codebases that lock you to a single vendor.
The GrapeBytes Way100% intellectual property ownership, strict type safety, & clear documentation.
A structured, highly collaborative engineering framework designed to ship premium mobile experiences on time and on budget.
Phase 01 · Week 1
Discovery & Architecture Blueprint
Product Blueprint & Strategy Mapping
Before writing a single line of code, we align your business goals with the technical architecture. We define user flows, database schemas, and decide on native (Swift/Java) or cross-platform (Flutter) approaches based on your requirements.
Key Actions & Focus Areas
- +Interactive requirements workshop & user story mapping
- +Database schema and cloud architecture design
- +API integrations mapping and third-party service analysis
- +Choice of tech stack tailored to scale
Primary DeliverableA comprehensive App Blueprint containing full database schema diagrams, user flow mapping, and technical architecture specs.
Phase 02 · Weeks 2–4
Premium UX/UI Prototyping
Designing Visual Excellence & Feel
Great apps feel alive. We design bespoke interfaces that respect Apple’s Human Interface Guidelines and Google’s Material Design. Every screen is designed for maximum ease-of-use, low cognitive load, and high conversion.
Key Actions & Focus Areas
- +High-fidelity screen layouts and custom branding assets
- +Intuitive UI that users understand instantly, without instructions
- +Micro-interaction mapping (animations, gestures, haptics)
- +User testing and continuous design refinement cycles
Primary DeliverableA dummy version of the app with sample data, so you can try its flow before full development begins.
Phase 03 · Weeks 5–12
Agile Native-Grade Development
Robust Engineering & Continuous Integration
We build your application in agile sprints, delivering testable builds every Friday. Our senior engineers follow clean-architecture principles, write automated unit/UI tests, and implement type safety to ensure zero-regression scaling.
Key Actions & Focus Areas
- +Weekly agile sprint releases with direct demo reviews
- +Robust backend integration and state management configuration
- +Automated CI/CD pipelines ensuring instant testing runs
- +Rigorous code reviews and unit test coverage
Primary DeliverableWeekly access to test builds via Apple TestFlight and Google Play Console so you track real progress live.
Phase 04 · Week 13
Launch Care & Growth Setup
App Store Launch & Hyper-Care Optimization
Launching is just the beginning. We guide your app through Apple and Google review cycles, and set up the foundation for growth: crash analytics, tracking pixels, customer support tools, and store optimization metrics.
Key Actions & Focus Areas
- +End-to-end Apple and Google store review & publishing support
- +Crash analytics (logs) via Firebase + SEO
- +Pre-launch load testing and security audits
- +30-day post-launch hyper-care support with direct developer hotlines
Primary DeliverableA live app in the App Stores, integrated with analytical dashboards, and 30 days of dedicated architectural maintenance support.
From design to stores, explore the cross-platform applications we have engineered.
Live AppGymPass
A seamless gym booking application where customers can discover classes, reserve time slots, and manage active memberships on the go.
- iOS App
- Android App
- UI/UX Design
- Membership Systems
Everything you need to know about working with us, our technical choices, and project delivery.
The cost of building an application is calculated individually based on the project's scope, required features, and design complexity. Since every app we build is custom-tailored to your business goals, we do not offer rigid template pricing. During our free strategy call, we analyze your requirements and provide an accurate technical blueprint and a customized cost estimate.
We choose the technology that fits your goals. For most startups, the cross-platform framework Flutter is excellent because it allows launching on both iOS and Android simultaneously from a single codebase, saving up to 40% in costs. For apps requiring intensive hardware integrations, complex 3D graphics, or maximum device performance, we design pure Native Swift and Java architectures.
Yes. Alongside mobile apps, we build fast, SEO-friendly websites and web applications with React in TypeScript, from company sites and landing pages to full web apps. When a project needs both, the web and mobile apps can share the same backend, design system and business logic, so your product stays consistent on every screen.
You do, 100%. Upon final project delivery and payment, full ownership of the intellectual property (IP), source code, designs, and credentials is transferred directly to your company. We host code in your private GitHub repositories from day one, so you have complete visibility.
We split the project into logical milestones (e.g., Blueprint & Design, Alpha Version, Beta Testing, Production Release). Payments are made in installments upon successful delivery and review of each milestone, ensuring you only pay for completed, working deliverables.
Yes. Every application we build includes 30 days of free hyper-care support after store launch to monitor crash logs and fix any initial issues. Following that, we offer custom monthly SLA agreements for continuous maintenance, OS updates, analytics reporting, and scaling new features.
Stop waiting for the perfect time. Schedule a session with our Senior Architects to analyze your app requirements, architecture roadmap, and get an accurate cost estimate.
- 01
Free 30-Min Strategy Call
We outline your app's technical architecture and map dependencies.
- 02
No Sales Pressure
Talk directly with lead engineers, not aggressive account executives.
- 03
Actionable App Blueprint
Get a copy of the high-level roadmap and structural cost spreadsheet.
Prefer email? Write to us at
info@grape-bytes.com