--- title: "Stair Tangent — App Overview" url: https://marlvel.ai/apps/com-raftertools-stair-tangent category: Business developer: Sim Ayers platforms: ios rating: 2.3 (3 ratings) pricing: paid report_level: overview generated: 2026-04-30 last_verified: "2026-04-30T10:52:26.562Z" --- > **Key Insight:** This is a niche utility app focused on reducing calculation errors for non-specialist carpenters building code-compliant stairs. | Metric | Value | |--------|-------| | Category | Business | | Rating | 2.3 ★ (3) | | Pricing | paid | | Platforms | iOS | | Latest Version (iOS) | 1.5 | | Developer | Sim Ayers | ## What is Stair Tangent? Stair Tangent is an iOS calculator designed to assist rough frame carpenters in performing accurate stair building calculations. The app helps users avoid cumulative math errors by providing automated layout tools and building code compliance checks for six distinct stair types. ## Key Features - **Stair Geometry Support**: Calculates dimensions for six stair types, including circular, flared, 45-degree stringers, and landing heights. - **Code Compliance Checking**: Automatically validates riser heights and tread widths against standard building code requirements. - **Flexible Input Modes**: Allows users to toggle between locked and unlocked tread width settings for customized stair layouts. - **Rapid Circular Layout**: Provides specialized tools to layout circular stairs in under ten minutes. ## Who is it for? Rough frame carpenters who require occasional assistance with stair geometry and code-compliant measurements. ## Links - [App Store](https://apps.apple.com/us/app/stair-tangent/id1173630967?uo=2) - [Full Intelligence Report](https://marlvel.ai/apps/com-raftertools-stair-tangent) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/com-raftertools-stair-tangent).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*