# Towronix — Pro Builder Calculator

> Pro Builder Calculator (iPhone/iPad app by Yaroslava Chopik.)

- Source: https://appshunter.io/ios/app/towronix/id6782826766 (this page in markdown: same URL + `.md`)
- Developer: [Yaroslava Chopik](https://appshunter.io/developer/6782826768)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 39 MB
- Languages: English
- Released: 2026-06-25
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/towronix/id6782826766/reviews.md

## What is Towronix?

Towronix is the go-to construction calculator for residential builders, carpenters, and contractors. Design code-compliant staircases, plan decks from framing to finish, and look up span tables and lumber specs — all in one fast, intuitive app built for the job site.

Stair design starts with your total rise and riser count. Towronix instantly generates a complete cut sheet with a visual stringer diagram and runs a live safety check against residential code thresholds — riser height, tread depth, headroom clearance, and the 2R+T comfort formula. Warnings and critical flags surface problems before you cut a single board, and a one-tap export sends the finished cut sheet straight to your photo library.

Deck planning is just as fast. Build a full deck worksheet in minutes: Towronix sizes joists and beams by species, spacing, and span; calculates posts, footings, and railing layout; and produces a grouped material takeoff list ready to hand to the lumber yard. Whether you're framing a ground-level platform or a multi-level deck with a ledger attachment, Towronix handles every number so you can focus on the build.

The built-in Reference library gives you instant access to joist and beam span tables, nominal vs. actual lumber dimensions, a board-foot calculator, fraction-to-decimal and inch-to-metric converters, and a concrete bag estimator for slabs, tubes, and pads. Save stair and deck calculations to named projects, attach job-site photos, and pull everything back up on your next visit. Supports both imperial and metric units with selectable fraction precision (1/4", 1/8", 1/16").


## Version history (last 2 releases)

### 2.1 — 2026-07-01

Minor UI fixes
Performance improvements

### 1.0 — 2026-06-25

No release notes.

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*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 2026-07-09.*