# C族记忆宫殿 vs Dual N

The clearest difference is rating: C族记忆宫殿 at 5.0 against Dual N's 4.3. C族记忆宫殿 also leads on monetization model (free vs free with in-app purchases) and device support (3 vs 1). Dual N's advantage is ratings volume (19 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. C族记忆宫殿 sells 10 one-off in-app purchases and Dual N sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

C族记忆宫殿 holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Dual N has 19 ratings behind it against 2, so its average is the more settled of the two.

C族记忆宫殿 ships an update every 3 weeks, Dual N every 10 days. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | C族记忆宫殿 | Dual N |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/c/id1150791097/reviews)** | [4.3 (19 ratings)](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504/reviews) |
| Number of ratings | 2 | **19** |
| Positive reviews | — | 48.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 43 MB | 41 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [GuangDong Chao Zu Industry Co.,Ltd](https://appshunter.io/developer/1236664422) | [Hiromi Fujita](https://appshunter.io/developer/1364801021) |

## What reviewers say

### C族记忆宫殿

[App page](https://appshunter.io/ios/app/c/id1150791097)

This app offers a fun and engaging way to train memory using a patented technique. It provides tailored exercises for various age groups and learning needs, from young children to professionals and seniors. Explore a universe of memory techniques through interactive challenges and video tutorials.

**Highlights:** Patented memory technique, Gamified learning challenges, Video tutorials, Tailored exercises for all ages, Focus on concentration and imagination, Memory competition modules

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 600C点 | $0.99 | one-time |
| 1200C点 | $1.99 | one-time |
| 1个月VIP会员 | $5.99 | one-time |
| 5000C点 | $5.99 | one-time |
| 2月VIP | $6.99 | one-time |
| 9800C点 | $9.99 | one-time |
| 1年VIP | $19.99 | one-time |
| 2年VIP | $29.99 | one-time |
| 10年会员 | $59.99 | one-time |
| 3年VIP | $69.99 | one-time |


### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504)

This scientifically proven brain training app enhances working memory, concentration, and cognitive abilities. It helps improve IQ, memory, and thinking speed through engaging gameplay that challenges your brain. Consistent practice leads to noticeable improvements in focus and mental agility.

**Highlights:** Strengthens working memory, Improves concentration, Enhances cognitive abilities, Difficulty adjustment (N-2 to N-5), Progress visualization with graphs, Statistics and calendar tracking, Global player rankings

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Features | $1.99 | per month |
| Annual Premium Features | $19.99 | per year |


## Frequently asked questions

### Is C族记忆宫殿 free?

C族记忆宫殿 is free to download, with in-app purchases available.

### Is Dual N free?

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

### Which has better reviews, C族记忆宫殿 or Dual N?

C族记忆宫殿 is rated higher. C族记忆宫殿 averages 5.0 out of 5 from 2 ratings, while Dual N averages 4.3 from 19 ratings.

### Do C族记忆宫殿 or Dual N have ads?

Neither C族记忆宫殿 nor Dual N shows ads.

### Which is updated more often, C族记忆宫殿 or Dual N?

C族记忆宫殿 ships an update every 3 weeks, and Dual N every 10 days. Most recently, C族记忆宫殿 was updated on November 6, 2026 and Dual N on November 3, 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.*