# Rigging Sling Angle Calculator — Leg Tension & Design Factor

> Leg Tension & Design Factor (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/rigging-sling-angle-calculator/id6760925849 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities
- Price: $0.99 (on sale, was $1.99)
- Age rating: 4+
- Requires: iOS 26.2 · 1 MB
- Languages: American English
- Released: 2026-03-23
- Data updated: 2026-09-05
- User reviews in markdown: https://appshunter.io/ios/app/rigging-sling-angle-calculator/id6760925849/reviews.md

## What is Rigging Sling Angle Calculator?

About to pick a load with a multi-leg sling and need to verify the tension per leg is within safe limits? Exceeding the sling angle threshold can cause catastrophic failure. This app computes angle, tension per leg, and design factor for 2, 3, and 4-leg configurations instantly.

Enter load weight, sling length, and vertical height. Get sling angle from vertical, tension per leg, design factor, and pass/fail check against the 60° angle limit.

WHAT IT CALCULATES:
- Sling angle from vertical
- Tension per leg for 2, 3, and 4-leg configurations
- Total tension across all legs
- Design factor (total tension ÷ load weight)
- Pass/fail safety check

SLING CONFIGURATION:
- Multi-leg bridle (2, 3, 4 legs)
- Metric (kg/m) and Imperial (lb/ft) units

KEY FEATURES:
- Built-in sling angle reference table
- Color-coded safety status
- Works completely offline
- No account or login required

Built for riggers, crane operators, ironworkers, and safety officers.


## Version history (last 5 releases)

### 1.0.4 — 2026-09-03

Updated app name and metadata.

### 1.0.3 — 2026-06-28

Added a More Pro Tools section to discover related field calculators.

### 1.0.2 — 2026-05-18

Bug fixes and performance improvements.

### 1.0.1 — 2026-04-15

Bug fixes and performance improvements.

### 1.0 — 2026-03-23

No release notes.

## More apps by Shanghai Sheyuan Network Technology Co., Ltd.

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- [Concrete Block Wall Est](https://appshunter.io/ios/app/concrete-block-wall-est/id6760607814)

All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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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 2026-09-05.*