Modernize Legacy Applications Without Disrupting Your Business

Get modern web and mobile interfaces over your green-screen and legacy apps without the risk of a rewrite. Your existing systems keep running, so you modernize one app at a time with nothing to rip out. Do it with your own team, or have our consultants take the whole project off your plate.

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Video: modernize a legacy green-screen application with m-Power Watch: Modernize a Green-Screen App · 7 min
1,500+
Customers worldwide
Since 1981
45+ years in business
4.7/5
Rating on G2

Why Modernize With m-Power?

The full rewrite is what stops most modernization projects before they start. So before you commit, you want answers: Do we have to replace the system underneath? What happens to the business logic we depend on? Can we do it in pieces instead of all at once? m-Power answers each one: It builds modern web and mobile apps directly over your existing data and logic, without changing the systems they run on. Build it internally with m-Power, or have our consultants build it for you.

01

Put a modern face on what you have

m-Power builds browser and mobile apps over your existing database and logic. The system underneath keeps doing its job.

  • Reuse your existing data and business rules
  • Modern web and mobile UI in any browser
  • No data migration, no rip and replace
02

Reuse the logic you already trust

Call your existing programs and business logic from the new apps, so you modernize the experience without rebuilding the rules.

03

Modernize one app at a time

Replace screens as the need arises. The legacy system keeps running the whole time, so there's no risky cutover weekend.

04

Add modern security to old apps

Single sign-on, row-level permissions, and role-based access on top of your existing authentication.

05

Roll it out without user fees

Perpetual license, no per-user or distribution fees. Give the modern apps to everyone who needs them.

∞
06

Build anything, on-prem or cloud

Forms, reports, dashboards, portals, and mobile apps over legacy data, deployed wherever you run.

  • One platform for every gap
  • Point-and-click build process
  • Your existing team, no new hires
See it over your data: Get a Demo
“

The cost to develop our brand new web-based extranet with m-Power, even including the m-Power consulting fees, cost one-fourth of what we were quoted for the band-aid solution of additional green-screen software licenses, resulting in a six-figure cost savings.

David Gillhouse, IT Director, Bimba Manufacturing

“

It was clear that m-Power offered Raleigh the right tool at the right price backed up by considerable experience.

Barrie Timson, Business Systems Manager, Raleigh Bicycles

“

We wanted to integrate our backend capabilities quickly and easily and that's exactly what it did. And it did a beautiful job.

Jerome Stillions, IT Director, Tichenor College Textbooks

What Can You Build?

Start with the front end, then keep going. Whether your team builds with m-Power or our consultants build for you, here's what you can deliver:

01 · The Modernization

A Green-Screen App, Rebuilt for the Browser

This walkthrough takes a legacy green-screen application and gives it a modern, browser-based interface, over the same data and logic. It's the whole process, start to finish, in a few minutes.

  • Keep the existing data and business rules
  • Deliver a modern web UI in any browser
  • Leave the underlying system running
Video: rebuild a legacy green-screen application for the browser with m-Power Watch: Modernize a Green-Screen App · 7 min
02 · Beyond the Front End

Then Build Mobile Apps, Workflows, and Dashboards Over It

Once the modern layer is in place, you can use the same platform to clear the rest of the backlog over your legacy data: Mobile access, approval workflows, real-time dashboards, and customer portals. One license, unlimited apps and users.

  • Mobile front ends over legacy data
  • Approval workflows with a full audit trail
  • Dashboards, portals, and APIs over old systems
Your legacy data, left where it is Mobile apps The same data on a phone or tablet Approval workflows Routed, with a full audit trail Real-time dashboards Live figures, with drill-down Portals and APIs Secure access for customers and partners

Ways Teams Modernize With m-Power

A few of the most common ways IT teams bring legacy applications into the browser. Build these yourself, or have our consultants build them for you:

Green screen to browser

Give terminal and green-screen apps a modern web interface over the same data.

Legacy report replacement

Replace old spooled and green-screen reports with real-time web reports.

Mobile over legacy data

Put phone and tablet front ends over systems your team can only reach from a desk.

Incremental UI modernization

Swap one screen at a time while the legacy system keeps running.

Security on old apps

Add single sign-on, role-based access, and audit trails to legacy systems.

APIs over legacy data

Expose old systems as REST APIs so modern apps can read and write to them.

Portals over legacy systems

Give customers and partners self-service access to data locked in old apps.

Retire in place

Move users off the green screen gradually, then retire it when you're ready.

Set up a demo and we'll modernize something over your data, live.

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Customer story

Bimba Manufacturing Modernized Its Green-Screen Extranet

Facing performance and capacity limits on their green-screen extranet, Bimba had a choice: Buy more licenses for the aging system, or modernize it. They used m-Power to build modern web applications over their 15-year-old mainframe, at a fraction of what more green-screen licenses would have cost.

  • Six-figure cost savings versus more legacy licenses
  • Modern web apps over their existing mainframe data
  • Better ease of use, plus new capabilities
Read the Bimba case study
Green-screen extranet At its capacity limit Modern web and phone apps 15-year-old mainframe data

Enterprise-Grade Security on Legacy Data

Run every modern app on the same security model as the rest of your environment, with more granular control than the green screen offered.

Row-level permissions

Control which users see which rows and columns in an application.

Role-based access

Lock down application and data access per user role.

Single sign-on

Integrate with Active Directory, OAuth2, or SAML.

Audit trails

Full logging of user actions and logins.

Frequently asked questions

Don't see your question? Ask us. You'll talk to a real person who actually cares whether this works for you.

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How does m-Power modernize an app without a rewrite?

m-Power, the low-code development platform from mrc, builds modern web and mobile applications directly over your existing database and business logic. It uses an extend-and-surround approach: The legacy system keeps running while new browser-based apps take over the user experience, so there is no full rewrite and no forced migration.

No. That is the point of the extend-and-surround approach. m-Power reads and writes your existing data and can reuse your existing programs, so the legacy system stays in place and keeps working while you modernize the front end around it.

If the data lives in a supported relational database (SQL Server, Oracle, Db2, MySQL, and more), m-Power can build over it, on-prem or cloud. Customers have modernized green-screen and mainframe applications, including systems like BPCS, into browser-based web and mobile apps.

Yes. Most teams modernize one screen or app at a time as the need arises. The legacy system keeps running throughout, so you avoid the risk and downtime of a big-bang cutover and you can stop, adjust, and re-prioritize as you go.

No. m-Power works over your data where it already lives, so there is no data migration required to start. If you later decide to move data to a different database, m-Power can build over the new location just the same.

m-Power adds single sign-on, row- and column-level permissions, and role-based access on top of your existing authentication (Active Directory, OAuth2, SAML), with every action logged. That is usually far more granular control than the legacy app offered.

Both. Your team can build with m-Power's low-code tools after a 5-day training, or our consultants can modernize your apps for you or alongside you. 96% of first-time services clients come back for another project.

m-Power is a one-time perpetual license with no per-user or distribution fees, so cost doesn't climb as you modernize more apps or add more users. See the pricing page for how licensing works.

Last updated: July 2026

See it for yourself

See your legacy app modernized

We'll walk through the build process live, using your data and your use case, and answer any questions your team has.

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