StairPlan: Stair Calculator
by ZHENGQIAO JIANG
· Utilities
· Free
On the App Store since May 2026
· Data updated
StairPlan: Stair Calculator is made and published by ZHENGQIAO JIANG. AppBrain is an independent app data site and isn't affiliated with ZHENGQIAO JIANG. The app name, icon, screenshots and description belong to ZHENGQIAO JIANG and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- September 14, 2026
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Releases
Updates seen on the App Store- Version
- 1.6.0
- Launched
- May 2026
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 2.63 MB
- Content rating
- Everyone
Technologies used by StairPlan: Stair Calculator
About the app and developer
About StairPlan: Stair Calculator
StairPlan: Stair Calculator is an utilities app developed by ZHENGQIAO JIANG.
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App Information
StairPlan: Stair Calculator is freely available from the App Store. The app size is 2.63 MB. The latest version available is 1.6.0. The last update was on September 14, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since May 2026.
Developer information for ZHENGQIAO JIANG
Address:
Store listing
By ZHENGQIAO JIANG, from the App Store
Screenshots by ZHENGQIAO JIANG, from the the App Store listing
Description by ZHENGQIAO JIANG Written by the developer, not by AppBrain. Click to read.
What does StairPlan do?
Calculates stringer length, riser height, tread depth, and pitch angle for any staircase — straight, L-shaped, U-shaped, winder, spiral, deck, or multi-flight with landings. Checks your numbers against US IRC, IBC, OSHA, ADA, Canada NBC, UK Approved Doc K, or Australia NCC in real time.
Is my data private?
100% offline. Nothing leaves your iPhone. No accounts, no analytics, no ads, no tracking.
What stair types does it handle?
- Straight, L-shaped, U-shaped, and winder stairs, plus multi-flight designs with 3+ landings, including split-level stairs that pass through more than one floor
- Spiral and helical stairs — center-pole radius, walkline tread, outer helix length
- Deck stairs with wood or composite stringer-spacing advisories, including wraparound and corner deck stairs via multi-flight layouts
What codes does it check?
- US IRC R311.7 (residential), IBC (commercial), OSHA 1910.25 (industrial), and ADA
- Canada NBC, UK Approved Doc K, and Australia NCC 2022
- Handrail height, guard height, and graspability checks
- Landing depth and minimum stair width compliance
- Rough opening sizing for code-compliant headroom
What else can it do?
- AR camera measurement — two taps straight into Total Rise (LiDAR gets +/-1 cm)
- 3D preview from 6 camera angles, alongside a scale side-view drawing
- Framing Square layout table with a full step-off table
- Smart Suggest — instant riser/tread combos that meet your chosen code
- Baluster spacing and structural throat/span checks
- Save unlimited projects with custom names and notes. Your saved projects stay viewable even if your subscription lapses — your work is never locked away.
What can I export?
Scale PDF cut diagrams that print at true size, a per-board cut list with plumb/level angles, DXF and SVG for CAD, a high-res PNG spec sheet, and a CSV cut list for spreadsheets.
What units does it support?
Imperial (feet and inches, fractions to 1/64) and Metric (millimeters and centimeters).
Who is this for?
Carpenters, finish carpenters, deck builders, renovation contractors, commercial and industrial estimators working to IBC or OSHA, and DIY homeowners building porch steps, deck stairs, or interior staircases.
How much does it cost?
3-day free trial, then $1.99/week, $4.99/month, $29.99/year, or $79.99 lifetime.
Terms of Use: https://taxlite.net/stair_stringer_calc/terms.html
Privacy Policy: https://taxlite.net/stair_stringer_calc/privacy.html
Calculates stringer length, riser height, tread depth, and pitch angle for any staircase — straight, L-shaped, U-shaped, winder, spiral, deck, or multi-flight with landings. Checks your numbers against US IRC, IBC, OSHA, ADA, Canada NBC, UK Approved Doc K, or Australia NCC in real time.
Is my data private?
100% offline. Nothing leaves your iPhone. No accounts, no analytics, no ads, no tracking.
What stair types does it handle?
- Straight, L-shaped, U-shaped, and winder stairs, plus multi-flight designs with 3+ landings, including split-level stairs that pass through more than one floor
- Spiral and helical stairs — center-pole radius, walkline tread, outer helix length
- Deck stairs with wood or composite stringer-spacing advisories, including wraparound and corner deck stairs via multi-flight layouts
What codes does it check?
- US IRC R311.7 (residential), IBC (commercial), OSHA 1910.25 (industrial), and ADA
- Canada NBC, UK Approved Doc K, and Australia NCC 2022
- Handrail height, guard height, and graspability checks
- Landing depth and minimum stair width compliance
- Rough opening sizing for code-compliant headroom
What else can it do?
- AR camera measurement — two taps straight into Total Rise (LiDAR gets +/-1 cm)
- 3D preview from 6 camera angles, alongside a scale side-view drawing
- Framing Square layout table with a full step-off table
- Smart Suggest — instant riser/tread combos that meet your chosen code
- Baluster spacing and structural throat/span checks
- Save unlimited projects with custom names and notes. Your saved projects stay viewable even if your subscription lapses — your work is never locked away.
What can I export?
Scale PDF cut diagrams that print at true size, a per-board cut list with plumb/level angles, DXF and SVG for CAD, a high-res PNG spec sheet, and a CSV cut list for spreadsheets.
What units does it support?
Imperial (feet and inches, fractions to 1/64) and Metric (millimeters and centimeters).
Who is this for?
Carpenters, finish carpenters, deck builders, renovation contractors, commercial and industrial estimators working to IBC or OSHA, and DIY homeowners building porch steps, deck stairs, or interior staircases.
How much does it cost?
3-day free trial, then $1.99/week, $4.99/month, $29.99/year, or $79.99 lifetime.
Terms of Use: https://taxlite.net/stair_stringer_calc/terms.html
Privacy Policy: https://taxlite.net/stair_stringer_calc/privacy.html