Apps by Armchair Engineering
Stair Help app icon

Utilities

Stair Help

Armchair Engineering

$1.99 4.48 · 4 storefronts · 406 ratings In-app purchases
Open on Apple

About this app

Stair Help is the easiest way to calculate staircase riser, going, stringer & base lengths when building! Features Include: - Accurately solve staircase equations - Set preferred units from: mm, cm, inches - Adjustable max riser height - Set preferred number of decimal places - Set preferred fraction of an inch precision (between 1/2 & 1/256)

Latest release

What’s New

Version 1.5.1 Nov 8, 2019

- Fixed floating keyboard bug, present on some devices running iOS 13

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
240 ratings
241 240 240 Aug 7, 2026 · 240 ratings Aug 12, 2026 · 241 ratings Oct 3, 2026 · 240 ratings Aug 7, 2026 Oct 3, 2026

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current $1.99
Historical low USD 1.99
Paid → free 0×
Price history
Current $1.99
$1.99 $1.00 Free Aug 7, 2026 · $1.99 Oct 3, 2026 · $1.99 Aug 7, 2026 Oct 3, 2026
  1. First observed Aug 7, 2026 · 10:43 PM $1.99

Screenshots

Stair Help iPhone screenshotStair Help iPhone screenshotStair Help iPhone screenshotStair Help iPhone screenshotStair Help iPhone screenshot Stair Help iPad screenshotStair Help iPad screenshotStair Help iPad screenshotStair Help iPad screenshotStair Help iPad screenshot