--- title: "Rafter Help — App Overview" url: https://marlvel.ai/apps/rafter-help category: Utilities developer: Armchair Engineering platforms: ios rating: 4.5 (211 ratings) pricing: paid report_level: overview generated: 2026-04-24 last_verified: "2026-04-24T03:48:47.386Z" --- > **Key Insight:** While the app offers versatile unit and pitch inputs, user feedback highlights significant concerns regarding the accuracy and practical utility of its dimensioning logic for real-world construction. | Metric | Value | |--------|-------| | Category | Utilities | | Rating | 4.5 ★ (211) | | Pricing | paid | | Platforms | iOS | | Latest Version (iOS) | 1.5.2 | | Developer | Armchair Engineering | ## What is Rafter Help? Rafter Help is a utility tool designed to calculate rafter lengths, roof pitch, and ridge height for gable roofs. It supports multiple input formats for pitch steepness and unit measurements, catering to users who need quick geometric solutions for construction projects. ## Key Features - **Gable Roof Calculations**: Finds roof pitch, rafter lengths, and ridge height based on room and ridge width. - **Advanced Calculation Mode**: Provides an advanced tab for users requiring more granular control over rafter equations. - **Flexible Input Formats**: Accepts pitch steepness in radians, decimal degrees, DMS, or rise/run ratios. - **Unit Customization**: Supports multiple measurement units including mm, cm, inches, and feet with configurable decimal precision. ## Who is it for? Construction professionals and DIY builders requiring rapid roof geometry calculations. ## Links - [App Store](https://apps.apple.com/us/app/rafter-help/id1006188060?uo=4) - [Full Intelligence Report](https://marlvel.ai/apps/rafter-help) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/rafter-help).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*