# Wing Loading Calculator vs Skydiving Logbook

The clearest difference is in-app purchases: Wing Loading Calculator at none against Skydiving Logbook's 1. Wing Loading Calculator also leads on update cadence (every 2 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Skydiving Logbook sells 1 in-app purchase, starting at $1.99 per month. Wing Loading Calculator asks for nothing beyond the download.

Wing Loading Calculator ships an update every 2 days, Skydiving Logbook every 2 weeks. The most recent releases landed on June 2, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Wing Loading Calculator | Skydiving Logbook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 2 MB | 11 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Robin Clohessy](https://appshunter.io/developer/1844735526) | [Jason Dodunski](https://appshunter.io/developer/1858434642) |

## What reviewers say

### Wing Loading Calculator

[App page](https://appshunter.io/ios/app/wing-loading-calculator/id6753731920)

**In-app purchases:** none


### Skydiving Logbook

[App page](https://appshunter.io/ios/app/skydiving-logbook/id6756087001)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Jumps | $1.99 | per month |


## Frequently asked questions

### Is Wing Loading Calculator free?

Wing Loading Calculator is free to download, with no in-app purchases.

### Is Skydiving Logbook free?

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

### Do Wing Loading Calculator or Skydiving Logbook have ads?

Neither Wing Loading Calculator nor Skydiving Logbook shows ads.

### Which is updated more often, Wing Loading Calculator or Skydiving Logbook?

Wing Loading Calculator ships an update every 2 days, and Skydiving Logbook every 2 weeks. Most recently, Wing Loading Calculator was updated on June 2, 2026 and Skydiving Logbook on October 12, 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.*