Build Specs
Jobsite Trade Calculators
About
This app simplifies complex construction calculations for tradespeople. It provides tools for laying out gas and water systems, sizing decks and stairs, and checking voltage drop, turning code charts into easy-to-use field tools.
What's New in Build Specs
1.0.7
September 21, 2026
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.
MoreSubscriptions & In-App Purchases
Build Specs Pro
Unlock every jobsite calculator and reference tool.
Developer apps
FAQ
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.
