# NPD知识普及 vs OurDance

The clearest difference is price: OurDance at Free against NPD知识普及's $0.99. OurDance also leads on update cadence (every 5 days vs every 7 months). NPD知识普及's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

OurDance is free to download; NPD知识普及 costs $0.99 up front. OurDance sells 1 one-off in-app purchase. NPD知识普及 asks for nothing beyond the download.

NPD知识普及 ships an update every 7 months, OurDance every 5 days. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | NPD知识普及 | OurDance |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 3 MB | 22 MB |
| Requires iOS | 18.5 | **18.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Jianchuan Information Technology Co., Ltd](https://appshunter.io/developer/1822428404) | [Ye Zhang](https://appshunter.io/developer/1842817676) |

## 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


### OurDance

[App page](https://appshunter.io/ios/app/ourdance-dance-practice/id6767887549)

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Unlock | $9.99 | one-time |


## Frequently asked questions

### Is NPD知识普及 free?

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

### Is OurDance free?

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

### Do NPD知识普及 or OurDance have ads?

Neither NPD知识普及 nor OurDance shows ads.

### Which is updated more often, NPD知识普及 or OurDance?

NPD知识普及 ships an update every 7 months, and OurDance every 5 days. Most recently, NPD知识普及 was updated on October 15, 2026 and OurDance on October 14, 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.*