# CorePath 9 vs DeltaBook

The clearest difference is in-app purchases: CorePath 9 at none against DeltaBook's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DeltaBook sells 1 in-app purchase, starting at $11.99 per month. CorePath 9 asks for nothing beyond the download.

CorePath 9 ships an update every 9 days, DeltaBook weekly. The most recent releases landed on October 1, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CorePath 9 | DeltaBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Size | 28 MB | 57 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nhat Huy Dang Huu](https://appshunter.io/developer/1871912555) | [Adam Weaver](https://appshunter.io/developer/1728008045) |

## What reviewers say

### CorePath 9

[App page](https://appshunter.io/ios/app/corepath-9/id6758276737)

**Features:** macOS Compatibility

**In-app purchases:** none


### DeltaBook

[App page](https://appshunter.io/ios/app/deltabook/id6762256857)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Access | $11.99 | per month |


## Frequently asked questions

### Is CorePath 9 free?

CorePath 9 is free to download, with no in-app purchases.

### Is DeltaBook free?

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

### Do CorePath 9 or DeltaBook have ads?

Neither CorePath 9 nor DeltaBook shows ads.

### Which is updated more often, CorePath 9 or DeltaBook?

CorePath 9 ships an update every 9 days, and DeltaBook weekly. Most recently, CorePath 9 was updated on October 1, 2026 and DeltaBook on October 17, 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.*