Custom App & Web Development

We Build Mobile Apps & Websites That Grow Your Business

From idea to the App Store and beyond. We design, develop, and deploy custom mobile apps (iOS & Android) and modern websites — built for real users, real performance, and real growth.

Mobile app and website development
1M+ App Users
50+ Projects Shipped
iOS & Web Full Stack
5★ Client Reviews
What We Build

Custom Apps & Websites for Your Business

Whether you need a native mobile app, a cross-platform solution, or a high-converting website — we handle design, development, and deployment end to end.

🤖
Android App Development
Kotlin & Cross-Platform

Android apps built natively with Kotlin or cross-platform with React Native and Flutter. We target billions of Android users with performant, material-design apps.

  • Kotlin
  • React Native
  • Flutter
  • Material Design
  • Play Store
🌐
Website Development
Modern & Responsive

Fast, responsive, SEO-optimized websites that convert visitors into customers. From marketing sites to full-stack web apps — modern design, mobile-first approach.

  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • SEO
Tech Stack

Built with Modern Technologies

We use the right tools for your project — proven technologies that scale.

🍎
Swift / SwiftUI
Native iOS development
⚛️
React Native
Cross-platform mobile apps
💙
Flutter
Beautiful cross-platform UI
🟢
Kotlin
Native Android development
Next.js
Full-stack React framework
🔷
TypeScript
Type-safe web development
🎨
Tailwind CSS
Rapid UI styling
🔥
Firebase
Backend & real-time data
🐘
PostgreSQL
Scalable database
☁️
AWS
Cloud hosting & scaling
🟩
Node.js
Backend APIs & services
🐍
Python
AI integration & automation
Our Process

From Idea to Launch in Weeks

A proven 3-step process to take your app or website from concept to live.

01
🎯
Discovery & Design

We understand your business goals, map user flows, and create beautiful UI/UX designs. You approve every screen before we write a single line of code.

02
⚙️
Development & Testing

We build your app or website using modern tech. Weekly demos keep you in the loop. Rigorous testing ensures everything works perfectly across devices.

03
🚀
Launch & Support

We handle App Store submission, domain setup, hosting, and go-live. Post-launch support keeps your product running smooth and growing.

Real Examples

Apps That Help Businesses Grow

Here's how custom apps and websites transform real businesses — from restaurants to professional services.

📧
Automated Email Outreach
Lead Generation & CRM

A custom web app that automates client outreach — scrapes leads from directories, generates personalized emails using AI, sends campaigns on schedule, and tracks opens/replies. Perfect for agencies, consultants, and service businesses looking to scale their pipeline without hiring.

  • Web App
  • AI Email Writing
  • Lead Scraping
  • Campaign Scheduling
  • Analytics Dashboard
🏋️
Fitness & Booking App
Appointment & Class Scheduling

A branded booking app for gyms, studios, and personal trainers — clients book classes, manage memberships, and get workout plans. Trainers manage schedules, send reminders, and track client progress. No more back-and-forth texts or missed appointments.

  • iOS & Android
  • Calendar Sync
  • Membership Billing
  • Push Reminders
  • Progress Tracking
🛒
E-Commerce Storefront
Online Store & Inventory

A custom e-commerce website tailored to your brand — product catalogs, variant management, secure checkout, inventory sync, and automated shipping notifications. Built to your exact needs instead of fighting with generic templates and expensive monthly platform fees.

  • Responsive Website
  • Stripe / PayPal
  • Inventory Management
  • Order Tracking
  • SEO Optimized

Let's Build Your App

Have an idea for a mobile app or website? Tell us your requirements and book a free consultation.

Free 30-minute consultation · No obligation · info@ondevtra.com