# Rigwise: Rigging Calculator — Sling, Crane, WLL & Load Chart

> Sling, Crane, WLL & Load Chart (iPhone/iPad app by Vytautas Jazbutis.)

- Source: https://appshunter.io/ios/app/rigwise-rigging-calculator/id6780810237 (this page in markdown: same URL + `.md`)
- Developer: [Vytautas Jazbutis](https://appshunter.io/developer/1829284015)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-06-18
- Data updated: 2026-07-02
- User reviews in markdown: https://appshunter.io/ios/app/rigwise-rigging-calculator/id6780810237/reviews.md

## What is Rigwise?

Rigwise is the rigging calculator built for the field — fast, correct, fully offline, and a one-time purchase. No subscription. No account. No internet required. Your data never leaves your phone.

Built for crane riggers, signal persons, ironworkers, and anyone who plans a lift.

THE CALCULATORS (always free)
• Sling Tension — see how the load in each leg climbs as the sling angle drops. Enter the angle, or just the sling length and height. Clear red warning below 30°.
• Working Load Limit — vertical, choker, and basket hitches, with the angle and D/d reduction factors applied.
• Center of Gravity — find how much each pick point actually carries when the load is off-center.
• Crane Capacity % — check your load against the chart capacity, with a warning when you're over.

Every result shows a plain-language safety state, glove-readable, in light or dark.

RIGWISE PRO — the studio (one-time purchase, yours forever)
• Gear inventory — log your slings, shackles, chains, and hooks with their tagged WLL.
• Inspection tracking — Rigwise flags gear that's overdue for inspection before you grab it.
• Lift Plans — save a named lift; Rigwise re-computes the numbers from your inputs so a saved plan is never a stale, hand-typed figure.
• Field-ready export — share a clean lift-plan summary with your crew.

WHY RIGWISE
• Works 100% offline — job sites don't have signal.
• One-time purchase — the tools you paid for keep working, forever.
• Private by design — no account, no tracking, nothing collected.
• Correct — the math is deterministic and exhaustively tested against standard rigging practice.

SAFETY
Rigwise is a calculation aid. Always verify every result against the manufacturer's tag, the load chart, and a qualified person. It is not a substitute for an engineered lift plan or professional judgment. Rigging is inherently hazardous; you are solely responsible for the safety of any lift.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro: Gear & Lift Plan Studio | $19.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-06-19

No release notes.

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All apps by Vytautas Jazbutis: https://appshunter.io/developer/1829284015

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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 2026-07-02.*