# Gradegree vs Duory

The clearest difference is in-app purchases: Gradegree at none against Duory's 4. Gradegree also leads on iOS requirement (13.4 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Duory sells 4 in-app purchases, starting at $2.99 per month. Gradegree asks for nothing beyond the download.

Gradegree ships an update every 3 days, Duory every 5 days. The most recent releases landed on September 21, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | Gradegree | Duory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 23 MB | 138 MB |
| Requires iOS | **13.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Omer Bengal](https://appshunter.io/developer/1515814233) | [Adegboyega Dada](https://appshunter.io/developer/1542474149) |

## What reviewers say

### Gradegree

[App page](https://appshunter.io/ios/app/gradegree/id6479556112)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duory

[App page](https://appshunter.io/ios/app/duory-language-learning-notes/id6504098229)

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duory Plus (Monthly) | $2.99 | per month |
| Duory Family Plus (Monthly) | $4.99 | per month |
| Duory Plus (Annual) | $29.99 | per year |
| Duory Family Plus (Annual) | $49.99 | per year |


## Frequently asked questions

### Is Gradegree free?

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

### Is Duory free?

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

### Do Gradegree or Duory have ads?

Neither Gradegree nor Duory shows ads.

### Which is updated more often, Gradegree or Duory?

Gradegree ships an update every 3 days, and Duory every 5 days. Most recently, Gradegree was updated on September 21, 2026 and Duory on July 6, 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.*