Will modernizing my app mean losing my existing users or data?

No, not if it’s done correctly. We plan migrations to preserve your existing user accounts and historical data, and we test carefully to make sure nothing breaks in the process.

How much does app modernization cost?

Cost depends on how outdated the current codebase is and how much of the app needs to change. A targeted redesign costs less than a full re-platform. We’ll give you a clear quote after auditing your app.

How long does app modernization take?

Timelines vary widely depending on scope, from a few weeks for a targeted redesign to several months for a full re-platform. We’ll give you a realistic estimate after the initial audit.

Do you offer support after the modernized app launches?

Yes. We offer ongoing maintenance so the app stays current and doesn’t quietly become outdated again.

Legacy App Modernization Services

01

One In-House Modernization Team

02

We Read Your Code Before We Touch It

03

Transparent Pricing and Timelines

04

Support That Doesn’t End at Launch

The same designers, developers, and QA specialists who audit your existing app are the ones who rebuild it, so nothing gets lost translating years of undocumented decisions into a new codebase.

Before we touch a line of code, we go through your existing app to understand what’s actually broken versus what’s just old. That difference changes the whole scope of the project.

You’ll get a clear quote and a realistic delivery timeline before development starts, not a number that grows once we’re a month into the codebase.

A modernized app still needs upkeep. We offer ongoing maintenance, so the investment you just made doesn’t quietly go stale again in another few years.

01

One In-House Modernization Team

02

We Read Your Code Before We Touch It

03

Transparent Pricing and Timelines

04

Support That Doesn’t End at Launch

01.

Legacy App Modernization

We migrate apps off outdated languages, frameworks, and dependencies onto a modern, supported stack, so you’re not one OS update away from your app breaking entirely.

02.

App Redesign and UI/UX Overhaul

If your app still works but looks and feels a decade old, we redesign the interface around how users actually expect apps to work today, without necessarily touching the backend underneath.

03.

Codebase Refactoring

We clean up and restructure existing code that’s become hard to maintain, so future updates take days instead of weeks, without changing what the app does from a user’s perspective.

04.

Platform Migration

We move apps from outdated native code to modern frameworks, or from a struggling hybrid build to a proper native or cross-platform foundation, depending on what actually fits your app.

05.

Performance Optimization

Slow load times and laggy interactions push users away. We profile your app to find what’s actually causing the slowdown and fix the real bottleneck instead of guessing.

06.

Backend and Database Modernization

We update outdated backend infrastructure and database structures to something that can actually scale, without losing the historical data your business depends on.

07.

Modernization QA and Regression Testing

Every change gets tested against your app’s existing functionality, so modernizing the app doesn’t quietly break a feature your users rely on every day.

08.

Post-Modernization Maintenance and Support

After the rebuild ships, we stay on to patch bugs, apply updates, and make sure the app you just modernized doesn’t drift back into needing another modernization in two years.

A UI refresh or a fix for a handful of specific problems, without touching the underlying architecture. These sit at the lower end.

A meaningful chunk of the codebase gets rebuilt or migrated, along with a design refresh. These cost more and take longer.

The app is effectively rebuilt on a new foundation, often alongside new features that weren’t feasible on the old stack. These sit at the top end, comparable to building a new app from scratch.

Modernize When

The core functionality still works and users generally like what the app does, but the code underneath is outdated, slow, or hard to maintain. Modernizing preserves what’s working while fixing what isn’t.

Core functionality still fits your business
Existing user base and data to preserve
Lower cost and faster timeline than a rebuild

Rebuild When

The app’s fundamental architecture can’t support what your business needs now, or the codebase is in bad enough shape that patching it costs more over time than starting clean.

Architecture can’t support current needs
Codebase too fragile to safely modify
Business requirements have changed significantly

01Discovery and Audit

We start with a full technical audit of your existing app, documenting what’s actually broken, what’s just old, and what’s still working fine as-is.

02Design

Our designers map out what changes, visually and structurally, based on what the audit found, not a redesign for its own sake.

03Development

Our developers migrate and rebuild the app in stages where possible, so you’re not stuck with a frozen product for months while a full rewrite happens behind the scenes.

04Testing

We test every change against the app’s existing functionality, so the modernized version does everything the old one did, plus what it couldn’t.

A company that jumps straight to a rebuild quote without reviewing your current app is guessing, not scoping. A real legacy app modernization process starts with an honest audit.

Migrating an existing app with real users and real data is a different skill set than building something from a blank canvas. Ask about specific modernization projects, not just new app work.

A vague quote that “depends on what we find” without a real audit first is a red flag. Ask for an itemized estimate based on an actual look at your code.

Make sure your contract states clearly that you retain ownership of the source code, the app, and your user data throughout the migration, not just after final payment.

An app that just got modernized still needs upkeep. Ask what support looks like once the project wraps, so you’re not back here again in two years.

It depends on whether the core functionality still fits your business and whether the codebase can realistically be updated versus needing to be replaced. We’ll do a technical audit and give you an honest recommendation either way.

Legacy App Modernization
Services

Why Choose Stateside Digitals for
App Modernization