# NPD知识普及 vs 大脑健身房

The clearest difference is in-app purchases: NPD知识普及 at none against 大脑健身房's 2. 大脑健身房's advantage is update cadence (monthly vs every 7 months). On price, review sentiment, ads and device support there is nothing between them.

NPD知识普及 costs $0.99 and 大脑健身房 $0.99 up front. 大脑健身房 sells 2 in-app purchases, starting at $0.99 per month. NPD知识普及 asks for nothing beyond the download.

NPD知识普及 ships an update every 7 months, 大脑健身房 monthly. Both last shipped on November 5, 2026.

## The numbers

| Metric | NPD知识普及 | 大脑健身房 |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | Paid | — |
| Size | 3 MB | 8 MB |
| Requires iOS | 18.5 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Jianchuan Information Technology Co., Ltd](https://appshunter.io/developer/1822428404) | [飞 杨](https://appshunter.io/developer/1493121831) |

## What reviewers say

### NPD知识普及

[App page](https://appshunter.io/ios/app/npd/id6749845582)

This app provides comprehensive knowledge, assessment, coping strategies, and support for individuals interested in Narcissistic Personality Disorder (NPD). It draws from psychological research and clinical experience to help users understand NPD and find professional assistance.

**Highlights:** NPD knowledge base, Self-assessment tools, Coping strategy guidance, Professional support resources, Based on psychological research, Clinical practice experience

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

**In-app purchases:** none


### 大脑健身房

[App page](https://appshunter.io/ios/app/id6760244284)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $7.99 | per year |


## Frequently asked questions

### Is NPD知识普及 free?

NPD知识普及 costs $0.99, with no in-app purchases.

### Is 大脑健身房 free?

大脑健身房 costs $0.99, and also offers in-app purchases.

### Do NPD知识普及 or 大脑健身房 have ads?

Neither NPD知识普及 nor 大脑健身房 shows ads.

### Which is updated more often, NPD知识普及 or 大脑健身房?

NPD知识普及 ships an update every 7 months, and 大脑健身房 monthly. Most recently, NPD知识普及 was updated on November 5, 2026 and 大脑健身房 on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*