# Sling Load Calculator vs Rigwise

The clearest difference is price: Rigwise at Free against Sling Load Calculator's $4.99. Rigwise also leads on update cadence (every 3 months vs every 48 months). Sling Load Calculator's advantage is in-app purchases (none vs 1) and chart position (#190 vs unranked). On ads and device support there is nothing between them.

Rigwise is free to download; Sling Load Calculator costs $4.99 up front. Rigwise sells 1 one-off in-app purchase. Sling Load Calculator asks for nothing beyond the download.

Sling Load Calculator ships an update every 48 months, Rigwise every 3 months. The most recent releases landed on June 1, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Sling Load Calculator | Rigwise |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/sling-load-calculator/id1397392678/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 3 months** |
| Monetization | Paid | — |
| Best chart rank | **#190** | — |
| Size | 18 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Vytautas Jazbutis](https://appshunter.io/developer/1829284015) |

## What reviewers say

### Sling Load Calculator

[App page](https://appshunter.io/ios/app/sling-load-calculator/id1397392678)

**Currently charting:** #190 Top Paid · Utilities (US App Store)

This utility app helps determine the force exerted on lifting slings by calculating sling stress. It removes guesswork for safe lifts by considering sling capacity, load weight, and various length and distance measurements.

**Highlights:** Calculate sling stress, Determine force on lifting slings, Input rated safe working load, Input total load weight, Input sling length, Input vertical distance to hook

**Features:** macOS Compatibility

**In-app purchases:** none


### Rigwise

[App page](https://appshunter.io/ios/app/rigwise-rigging-calculator/id6780810237)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

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


## Frequently asked questions

### Is Sling Load Calculator free?

Sling Load Calculator costs $4.99, with no in-app purchases.

### Is Rigwise free?

Rigwise is free to download, with in-app purchases available.

### Do Sling Load Calculator or Rigwise have ads?

Neither Sling Load Calculator nor Rigwise shows ads.

### Which is updated more often, Sling Load Calculator or Rigwise?

Sling Load Calculator ships an update every 48 months, and Rigwise every 3 months. Most recently, Sling Load Calculator was updated on June 1, 2026 and Rigwise on September 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*