StairSmith
Stair calculator. No subs.
Price history
About
This app calculates stair dimensions, checks building codes, and generates cut lists for builders and DIYers. It provides live diagrams, lumber information, and framing square layouts, all without requiring an account or subscription. The tool is designed for efficiency at the workbench and offers print-ready PDFs.
What's New in StairSmith
1.0.2
May 14, 2026
Polish and bug fixes.
Charts
Developer apps
FAQ
What is StairSmith?
StairSmith is a utility app designed to calculate stair dimensions, check building code compliance, and generate cut lists for builders and DIYers. It offers features like live elevation diagrams and framing square layouts.
How much does StairSmith cost?
StairSmith is a one-time purchase priced at $6.99. The developer emphasizes that there are no subscriptions, upsells, or hidden "Pro" tiers.
Does StairSmith have ads?
No, StairSmith is ad-free. The developer explicitly states that the app collects no data, including analytics or tracking, and contains no advertisements.
What building codes does StairSmith support?
StairSmith supports multiple building codes including IRC 2021, IBC 2021, NBC 2020, UK Part K, and Australia NCC. It performs pass/fail checks for riser, going, 2R+T, and headroom.
What devices is StairSmith available on?
StairSmith is available on iPhone and iPad. It is designed for iOS devices.
How often is StairSmith updated?
The latest version, 1.0.2, was released on May 14, 2026, indicating recent development activity. The app was initially released on May 7, 2026.
What are the limitations of StairSmith?
Currently, StairSmith v1.0 only supports straight, single-flight stairs. Features like multi-flight stairs, winders, and landings are not included in the current version but may be added in the future.
Is StairSmith suitable for beginners?
Yes, StairSmith is designed for DIY homeowners as well. It includes helpful explanations for measurements and dimensions, teaching users as they go.