Your App Is Losing You Customers

Your app breaks on mobile. Pages load in 8 seconds. Every change risks breaking something else. We rebuild outdated web and mobile applications into fast, modern platforms. First working version in 14 days.

14 Days to First Release

5x Faster Than Traditional

3x Cheaper to Rebuild

0 Downtime During Rebuild

The Problem

Signs your app needs a rebuild

If any of these sound familiar, your app is costing you money every day it stays the way it is.

Breaks on mobile

  • Forms cut off, buttons are impossible to tap, layouts fall apart. Over half your visitors are on phones.

Slow page loads

  • Every second over 3 seconds costs you 7% of conversions. If your site loads in 8 seconds, do the math.

Can't add features

  • Every small change risks breaking something else. Your developer says "it's complicated" and quotes you weeks of work.

Old tech, no patches

  • Running jQuery 1.x, PHP 5, Magento 1, or Angular 1? Those stopped getting security updates years ago.

Customers leave silently

  • No error reports. No complaints. They just go to your competitor with a faster site. You never know what you lost.

"It still works" is expensive

  • The longer you wait, the harder the rebuild. And every month your old app runs, it falls further behind what customers expect.

Case Study

North Suburban Limousine

Airport limo service in Chicago. We rebuilt their entire booking system and added new trip types.

Before

  • Not mobile-optimized
  • 200+ item dropdown lists, no autocomplete
  • Airport trips only, no other booking types
  • PNG images, no CDN
  • Slow load times on all devices

After

  • Responsive, mobile-first
  • Smart address input with autocomplete
  • Airport, point-to-point, Soldier Field, hourly charters
  • Modern tech stack (Next.js, React, Tailwind)
  • Optimized images, fast load times
  • Structured data markup

Same booking system. Rebuilt in weeks. Four new trip types added.

What We Rebuild

Types of apps we modernize

Web apps, mobile apps, anything with a screen and users. If it's showing its age, we can rebuild it.

Booking systems

  • Reservations, appointments, scheduling. Limo services, restaurants, clinics, salons. We rebuild the flow and make it work on every device.

E-commerce stores

  • Old Magento, WooCommerce, or custom PHP shops. We migrate products, rebuild checkout, and make it fast.

B2B ordering portals

  • Wholesale ordering, customer-specific pricing, catalogs with thousands of SKUs. Our strongest area with 20 years of experience.

SaaS applications

  • Legacy SaaS on an old stack that's hard to maintain and impossible to hire for. We rewrite it on modern tech.

Internal tools

  • Admin panels, CRMs, dashboards, reporting systems. The tools your team uses every day but nobody wants to touch the code.

Mobile apps

  • iOS and Android apps that crash, look dated, or can't keep up with new OS versions. We rebuild on modern frameworks.

Client portals

  • Patient portals, customer accounts, self-service platforms. Where your users log in and get things done.

Our Process

How we rebuild your app

Your current app keeps running the whole time. We build the new version in parallel and switch over when it's ready.

  1. Free audit

    • We look at your app, check the tech stack, measure speed, and find the biggest problems. Takes a day. Costs nothing.

  2. Proposal in 2-3 days

    • You get a clear scope: what we rebuild, what we add, what it costs, and how long it takes. No 50-page documents.

  3. First release in 14 days

    • AI agents write code. Senior engineers review every line. You see a live demo every week and give feedback as we go.

  4. Launch

    • We test everything, migrate your data, and switch over. Zero downtime. You own the code, the repo, and the infrastructure.

Why Us

Why Devvela

20 years, 250+ projects

  • We've been building web applications since 2007. We've seen every kind of legacy codebase and know how to deal with it.

Senior engineers only

  • No juniors, no handoffs. The person who architects your rebuild is the same person who reviews the code.

AI-powered speed

  • We use AI coding tools to handle routine work. Engineers focus on architecture and quality. That's how we deliver 5x faster.

You own everything

  • Your code, your repo, your infrastructure accounts. No vendor lock-in. Walk away anytime with everything you paid for.

Milestone-based payment

  • Pay for completed work, not hours. If we don't deliver the milestone, you don't pay for it.

Zero downtime

  • Your old app runs until the new one is tested and ready. We switch over when you say go.

Questions about modernization

How long does it take to modernize a web application?

First working version in 14 days. A full modernization typically takes 4-8 weeks depending on the size of the application. You see progress every week with live demos.

How much does web app modernization cost?

Most projects start at $15,000-$30,000 for the first release. Total cost depends on the scope of the rebuild. We use AI-powered development to deliver 3x cheaper than traditional agencies.

Will my app have downtime during the rebuild?

No. We build the new version separately while your current app keeps running. We only switch over when the new version is tested and ready. Zero downtime.

Can you add new features during the modernization?

Yes. Most clients add new functionality alongside the rebuild. For example, we rebuilt a limo booking system and added three new trip types in the same project.

What technologies do you rebuild apps with?

We typically use Next.js or React for frontends, PostgreSQL or Supabase for databases, and Vercel for hosting. We pick the stack based on your needs, not on trends.

Your app is older than 3 years?

Tell us what's not working. We'll look at it and tell you what it would take to fix. 15 minutes. No commitment.