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RedX Stairs - 3D Calculator

RedX Stairs - 3D Calculator

Design & Calculate Stairs

397 ratings
23 reviews
🔧 Utilities
💼 Business
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 24, 2021
  • June 22, 2026

Features

Developer

RedX Technology Inc
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iphone
ipad
🧾$6.99 - $179.99
In-App Purchase↘︎
⭐23
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About

This app simplifies complex stair calculations and designs with advanced 3D visualization. It offers a comprehensive suite of calculators for various stair types, supporting multiple measurement units and providing detailed, to-scale plans for professionals and DIYers.

✓Advanced 3D stair visualization
✓Comprehensive stair calculators
✓To-scale stair plans with precise measurements
✓Support for CM, MM, Feet, and Inches
✓Project saving and sharing options
✓Specialized tools for spiral and winder stairs
Show original description

What's New in RedX Stairs

3.1.7

June 22, 2026

New features to the stair builder and improved AI

Subscription plans

RedX Stairs Monthly

Gain full app access and all of its features.

$6.991 Month
How to cancel RedX Stairs subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

The old app worked better

Why are you attempting to add all of these new features for mobile? Did it occur to you that workers don’t always need to see this extra detail provided in the 3D model. It’s slower to load in the field and confusing for most users.
Too AmbitiousToo Ambitious

App does not work

It gets stuck on the opening screen
GdgbwGdgbw

Scam to charge you 60.00

Do not download it gets your Apple ID and if you don’t cancel it in 7 days charges you 60.00 SCAMMERS.
stair building homeownerstair building homeowner

Ref x

Great app for new or pros this app shows you a clear detail pdf of your project in full detail on what you are building! GJG Inc
GJG INCGJG INC

Horrible 🤮

At first, when I was paying for my subscription it was amazing, however 2 weeks after my subscription expired, I can’t view, edit, make a pdf, print, or share my projects, I don’t recommend it because it’s expensive and is missing many things/options for stairs
R&R Carpentry LLCR&R Carpentry LLC
See 18 more reviews

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FAQ

What does the RedX Stairs app do?

The RedX Stairs app is a powerful tool for designing and calculating stairs. It offers advanced 3D visualization and a comprehensive suite of calculators for various stair configurations, simplifying complex measurements and design processes for both professionals and DIY enthusiasts.

What are the key features of this stair calculator app?

Key features include advanced 3D visualization for all stair types, a wide range of calculators for straight, L-shaped, U-shaped, spiral, and winder stairs, interactive to-scale plans with precise measurements, and support for multiple measurement units (CM, MM, Feet, Inches). It also offers project management options like saving, printing, and sharing designs.

How is the app monetized and what are the costs?

The app offers in-app purchases for premium features and has subscription options available, including monthly or yearly plans. Payment is processed through your iTunes account, and pricing details for subscriptions can be found within the app. There are also free features available.

What types of stair designs can I create with this app?

You can design a wide variety of stair types, including Straight Stairs, L-Shaped Stairs, U-Shaped Stairs, Spiral Stairs, Winder Stairs, and Corner Deck Stairs. The app provides specialized tools for complex designs like Spiral, Curved, and Winder stairs, as well as Hip Stringers and Stairs with Landings.

Is this app compatible with different measurement units?

Yes, the app is designed for global applicability and supports multiple measurement units. You can perform calculations and design stairs using centimeters (CM), millimeters (MM), feet, and inches, ensuring accuracy regardless of your preferred system.