# Wingload calculator vs Skydive Book

The clearest difference is in-app purchases: Wingload calculator at none against Skydive Book's 2. Wingload calculator also leads on iOS requirement (10.0 vs 16.0). Skydive Book's advantage is update cadence (weekly vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Skydive Book sells 2 in-app purchases, starting at $5.99 per month. Wingload calculator asks for nothing beyond the download.

Wingload calculator ships an update every 3 weeks, Skydive Book weekly. Both last shipped on October 8, 2026.

## The numbers

| Metric | Wingload calculator | Skydive Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/wingload-calculator/id1509435000/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 14 MB | 66 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Igor Kamenev](https://appshunter.io/developer/910687200) | [Andrei Malyshau](https://appshunter.io/developer/1729094189) |

## What reviewers say

### Wingload calculator

[App page](https://appshunter.io/ios/app/wingload-calculator/id1509435000)

Calculate wing loading for skydivers with ease. Supports both kilograms and pounds for your convenience. A simple tool for a critical calculation.

**Highlights:** Wing load calculation, Supports kilograms, Supports pounds, Easy to use interface

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

**In-app purchases:** none


### Skydive Book

[App page](https://appshunter.io/ios/app/skydive-book/id6478469415)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month | $5.99 | per month |
| One Year | $19.99 | per year |


## Frequently asked questions

### Is Wingload calculator free?

Wingload calculator is free to download, with no in-app purchases.

### Is Skydive Book free?

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

### Do Wingload calculator or Skydive Book have ads?

Neither Wingload calculator nor Skydive Book shows ads.

### Which is updated more often, Wingload calculator or Skydive Book?

Wingload calculator ships an update every 3 weeks, and Skydive Book weekly. Most recently, Wingload calculator was updated on October 8, 2026 and Skydive Book on October 8, 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.*