# Skydive Book vs Altitude

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

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

Skydive Book ships an update weekly, Altitude daily. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Skydive Book | Altitude |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Size | 59 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Andrei Malyshau](https://appshunter.io/developer/1729094189) | [BENJAMIN RUSSELL DOBBINS](https://appshunter.io/developer/1857111396) |

## What reviewers say

### 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 |


### Altitude

[App page](https://appshunter.io/ios/app/altitude-skydive-logbook/id6807944045)

**In-app purchases:** none


## Frequently asked questions

### Is Skydive Book free?

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

### Is Altitude free?

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

### Do Skydive Book or Altitude have ads?

Neither Skydive Book nor Altitude shows ads.

### Which is updated more often, Skydive Book or Altitude?

Skydive Book ships an update weekly, and Altitude daily. Most recently, Skydive Book was updated on October 27, 2026 and Altitude on October 21, 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.*