# Correctbook App vs Duesy

The clearest difference is in-app purchases: Correctbook App at none against Duesy's 1. Duesy's advantage is update cadence (fortnightly vs every 9 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Duesy sells 1 in-app purchase, starting at $4.99 per month. Correctbook App asks for nothing beyond the download.

Correctbook App ships an update every 9 months, Duesy fortnightly. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Correctbook App | Duesy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Size | 30 MB | 30 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Correctbook](https://appshunter.io/developer/1691849771) | [Shaquill Ledes](https://appshunter.io/developer/6803645190) |

## What reviewers say

### Correctbook App

[App page](https://appshunter.io/ios/app/correctbook-app/id6450104369)

**Features:** Vision Pro support

**In-app purchases:** none


### Duesy

[App page](https://appshunter.io/ios/app/duesy-ai-life-admin/id6803645188)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duesy Premium | $4.99 | per month |


## Frequently asked questions

### Is Correctbook App free?

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

### Is Duesy free?

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

### Do Correctbook App or Duesy have ads?

Neither Correctbook App nor Duesy shows ads.

### Which is updated more often, Correctbook App or Duesy?

Correctbook App ships an update every 9 months, and Duesy fortnightly. Most recently, Correctbook App was updated on November 7, 2026 and Duesy on November 10, 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.*