# Chronocurl Pro vs RockBook

The clearest difference is price: RockBook at Free against Chronocurl Pro's $21.99. RockBook also leads on update cadence (every 10 days vs every 17 months). Chronocurl Pro's advantage is chart position (#80 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

RockBook is free to download; Chronocurl Pro costs $21.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chronocurl Pro ships an update every 17 months, RockBook every 10 days. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Chronocurl Pro | RockBook |
| --- | --- | --- |
| Price | $21.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 10 days** |
| Best chart rank | **#80** | — |
| Size | 36 MB | 52 MB |
| Requires iOS | **11.0** | 12.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guy Simard](https://appshunter.io/developer/1124720226) | [Christoffer Svae](https://appshunter.io/developer/1617861089) |

## What reviewers say

### Chronocurl Pro

[App page](https://appshunter.io/ios/app/chronocurl-pro/id1154050351)

**Currently charting:** #80 Top Paid · Sports (US App Store)

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

**In-app purchases:** none


### RockBook

[App page](https://appshunter.io/ios/app/rockbook-make-your-notes/id1617861087)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chronocurl Pro free?

Chronocurl Pro costs $21.99, with no in-app purchases.

### Is RockBook free?

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

### Do Chronocurl Pro or RockBook have ads?

Neither Chronocurl Pro nor RockBook shows ads.

### Which is updated more often, Chronocurl Pro or RockBook?

Chronocurl Pro ships an update every 17 months, and RockBook every 10 days. Most recently, Chronocurl Pro was updated on October 18, 2026 and RockBook 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.*