Staircase3D: Stair Calculator
Stair Calculator & 3D Design
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Staircase3D: Stair Calculator
Plan your staircase with stair stringer calculation, tread depth, riser height and landing dimensions. Calculate stringer geometry and inspect your staircase design in 3D.
Measure from finished floor to finished floor. Draw from the bottom of the staircase to the top. Two nodes per level are free; three or more require paid editing access.
Use 3D to inspect the stair and Save to commit the whole project. Recovery drafts are separate from saved projects. Always verify dimensions, construction and local requirements with a qualified professional.
Projects with up to two nodes per level are free. Keep unlimited projects. Saved 3D views, drawings, notes and exports remain available after your subscription ends.
Unlock editing for projects with three or more nodes on any level.
Eligible subscribers get the first month free, then pay the regular monthly price. Cancel before the trial ends to avoid being charged.
Renews automatically at the regular monthly price until cancelled in your Apple subscription settings.
Permanent editing access for all your projects. No recurring charge.
A lifetime purchase does not cancel your current subscription. Manage it with Apple to avoid further subscription charges.
Apple licence agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improvements to staircase editing and navigation. Closing an unfinished staircase now returns you to the model selector. Dimension changes are clearer, with confirmation before extending the final tread.
The developer, Widding Systems AS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Widding Systems AS
- Size
- 22.8 MB
- Category
- Graphics & Design
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 20 more
- English, Arabic, Danish, Dutch, Finnish, French, German, Hebrew, Hindi, Icelandic, Italian, Japanese, Korean, Lithuanian, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish
- Age Rating
4+
- 4+
- Contains
Advertising
User-Generated Content
- In-App Purchases
Yes
- Lifetime editing access $49.00
- Monthly editing access $3.99
- Copyright
- © 2026 Widding Systems AS