# Craftmetry — Jobsite Trade Calculators > Construction trade calculators for plumbing, electrical, and structural design. (iPhone/iPad app by Luke Kazmierowicz.) - Source: https://appshunter.io/ios/app/craftmetry/id6764092071 (this page in markdown: same URL + `.md`) - Developer: [Luke Kazmierowicz](https://appshunter.io/developer/902786228) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 72 MB - Languages: American English - Released: 2026-04-29 - Data updated: 2026-10-09 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/craftmetry/id6764092071/reviews.md ## What is Craftmetry? Craftmetry turns construction sizing tables and everyday jobsite math into fast, practical field tools for contractors, tradespeople, and serious DIYers. TOOLS INCLUDED Stair Calculator Calculate risers, treads, stair count, total rise, and layout. Review a detailed stringer-cut diagram and save named calculations. Square-Up Calculator Use the Pythagorean theorem to find a diagonal or missing side for square layouts and right triangles. Gas Line Sizing Quick-size natural gas and propane lines, or build a visual piping system with appliances, BTU loads, pipe lengths, and longest-length sizing guidance. Waterline Sizing Estimate PEX-A supply sizing from fixture demand or direct flow, and lay out separate hot and cold systems. Deck Joist Sizing Check common deck-joist sizing based on span, spacing, species, grade, and loading assumptions. Voltage Drop & Wire Size Estimate voltage drop or find a wire size that satisfies selected voltage-drop and ampacity limits. Save supported calculations and layouts on your device. Account sign-in can sync supported saved work and subscription access across Craftmetry on iPhone, iPad, and the web. Sign in to use web access, sync, or the account preview. Craftmetry provides reference calculations, not engineering or code-compliance approval. Always verify final designs with local codes, manufacturer specifications, and qualified professionals when required. Terms of Use (EULA): https://craftmetry.corvora.app/terms Privacy Policy: https://craftmetry.corvora.app/privacy ## Key features - Stair layout and stringer diagram - Gas line sizing with visual layout - Water line sizing and estimation - Deck joist and beam sizing - Voltage drop calculation - Residential system design tools ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Build Specs Pro | $39.99 | per year | | Build Specs Pro | $9.99 | per month | ## Frequently asked questions about Craftmetry ### What is Build Specs used for? Build Specs is a utility app designed to simplify complex construction calculations for tradespeople. It offers tools for laying out residential gas and water systems, sizing decks and stairs, and calculating voltage drop, transforming code charts into practical field tools. ### Does Build Specs have ads? No, Build Specs does not contain advertisements. The app is free to download and use, with optional in-app purchases for advanced features or a pro subscription. ### What are the subscription options for Build Specs Pro? Build Specs Pro offers two subscription plans: a monthly plan for $9.99 with a 7-day free trial, and an annual plan for $39.99, also with a 7-day free trial. These plans unlock additional features and capabilities beyond the free version. ### How accurate are the calculations in Build Specs? While Build Specs provides precise calculations based on industry standards, users are advised to always verify final designs with local codes, manufacturer specifications, and qualified professionals. The app aims to be a helpful tool but does not replace professional judgment. ### What devices is Build Specs compatible with? Build Specs is currently available for iPhone and iPod devices. It runs on iOS and is designed for mobile use in the field. ### How often is Build Specs updated? The latest version of Build Specs, 1.0.5, was released on June 23, 2026. Updates are provided regularly to improve functionality and add new features, ensuring the app remains current with industry needs. ### What specific trade calculations can Build Specs perform? Build Specs includes specialized calculators for stair layout, gas line sizing, water line sizing, deck joist and beam sizing, and voltage drop. Each tool provides detailed diagrams and sizing guidance relevant to its specific trade. ### What is the age rating for Build Specs? Build Specs has an age rating of 4+, making it suitable for a wide range of users. This rating indicates that the app's content is generally appropriate for young children and older audiences. ## Version history (last 5 releases) ### 2.0.0 — 2026-10-07 Introducing Craftmetry: Jobsite Trade Calculators, now available on iPhone and iPad. Your existing account, supported saved work, and subscription continue in the same app. This update also includes the latest calculator and planner improvements. Skip the charts. Get the answer. ### 1.0.7 — 2026-09-21 New in Build Specs 1.0.7: New Square-Up Calculator Calculate diagonals and missing side lengths using the Pythagorean theorem, with a clear visual diagram to help square up your layout. Other improvements: • Undo for deleted branches, fixtures, appliances, and cleared layouts in Gas and Water System Planners. • Clearer saved-layout selection, resumable working drafts, and separate Save changes and Save as new controls. • Optional account sign-in, saved-work sync, shared subscription access, and account deletion in About & Support. • Improvements to stair precision, deck and voltage calculations. ### 1.0.5 — 2026-06-23 Adds metric support to the Stair Calculator, including metric measurements and stringer length guidance. ### 1.0.3 — 2026-06-22 New in this version: Added a full stringer diagram to the Stair Calculator, making it easier to visualize your stair layout, tread marks, and cuts before you start building. Also includes small layout improvements and refinements. ### 1.0.2 — 2026-05-05 Improved clarity in subscription options. ## Apps similar to Craftmetry | App | Rating | Price | Category | | --- | --- | --- | --- | | [BuildCalc: Material & Estimate](https://appshunter.io/ios/app/buildcalc-material-and-estimate/id6764519874) | — | Free | Utilities | | [Carpenter Tools - Calculator](https://appshunter.io/ios/app/carpenter-tools-calculator/id6757513389) | 4.9 (8) | Free | Utilities | | [Stair Calculator: Run & Rise](https://appshunter.io/ios/app/stair-calculator-run-and-rise/id6502868383) | 4.2 (44) | Free | Utilities | | [Stair Calculator .](https://appshunter.io/ios/app/stair-calculator/id6760628453) | — | Free | Utilities | | [Construction Calculator : Xcal](https://appshunter.io/ios/app/construction-calculator-xcal/id6768104883) | 4.4 (18) | Free | Utilities | | [Stair Calculator: Construction](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366) | 4.1 (738) | Free | Utilities | ## More apps by Luke Kazmierowicz - [Succession - Rack-O style game](https://appshunter.io/ios/app/succession-rack-o-style-game/id952902924) - [Trumpify - Text like Trump](https://appshunter.io/ios/app/trumpify-text-like-trump/id1116455388) - [ScripterCam](https://appshunter.io/ios/app/scriptercam/id6774347836) All apps by Luke Kazmierowicz: https://appshunter.io/developer/902786228 ## Related topics [tiny plumbing calculators](https://appshunter.io/ios/topics/tiny-plumbing-calculators) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-09.*