# D vs Duo ABC

The clearest difference is rating: Duo ABC at 4.6 against D's 1.0. Duo ABC also leads on update cadence (every 3 weeks vs every 16 months) and ratings volume (21 vs 1). D's advantage is in-app purchases (none vs 8). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Duo ABC sells 8 in-app purchases, starting at $1.49 per 3 months. D asks for nothing beyond the download.

Duo ABC holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Duo ABC has 21 ratings behind it against 1, so its average is the more settled of the two.

D ships an update every 16 months, Duo ABC every 3 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | D | Duo ABC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/d-genius-viewer/id1137997606/reviews) | **[4.6 (21 ratings)](https://appshunter.io/ios/app/duo-abc/id1594001123/reviews)** |
| Number of ratings | 1 | **21** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 79 MB | 158 MB |
| Requires iOS | **14.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dreyfous & Associates](https://appshunter.io/developer/601526324) | [nguyen thanh](https://appshunter.io/developer/1481436893) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-genius-viewer/id1137997606)

This app offers an integrated digital curriculum designed for preschoolers. It uses interactive technology to engage children in learning, fostering research, critical thinking, and creativity. The program also encourages family and community involvement in the educational experience.

**Highlights:** Integrated digital curriculum, Interactive technology for learning, Fosters critical thinking, Nurtures creativity, Encourages family involvement, Promotes research and discovery

**Features:** macOS Compatibility

**In-app purchases:** none


### Duo ABC

[App page](https://appshunter.io/ios/app/duo-abc/id1594001123)

This app helps 10th-grade students master English with interactive tests and lessons. It offers offline access and allows for self-paced learning, making it a convenient tool for academic success.

**Highlights:** Offline Access, Interactive Tests, Self-paced Learning, Teacher-Friendly Interface, Grade 10 English Mastery

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Three Months VIP | $1.49 | per 3 months |
| Learning Premium Monthly Plan | $1.99 | per month |
| One Month VIP | $4.99 | per month |
| Learning Premium HalfYear Plan | $5.99 | per 6 months |
| Learning Premium Annual Plan | $9.99 | per year |
| 1 Year VIP | $24.99 | per year |
| Six Months VIP | $24.99 | per 6 months |
| No ads Pack | $14.99 | one-time |


## Frequently asked questions

### Is D free?

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

### Is Duo ABC free?

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

### Which has better reviews, D or Duo ABC?

Duo ABC is rated higher. D averages 1.0 out of 5 from 1 ratings, while Duo ABC averages 4.6 from 21 ratings.

### Do D or Duo ABC have ads?

Neither D nor Duo ABC shows ads.

### Which is updated more often, D or Duo ABC?

D ships an update every 16 months, and Duo ABC every 3 weeks. Most recently, D was updated on October 29, 2026 and Duo ABC on October 27, 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.*