# 知识星球 vs iSecSP

The clearest difference is in-app purchases: iSecSP at none against 知识星球's 14. 知识星球's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 知识星球 sells 14 one-off in-app purchases. iSecSP asks for nothing beyond the download.

知识星球 ships an update every 2 weeks, iSecSP every 3 months. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 知识星球 | iSecSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/id1039749242/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | 48.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 148 MB | 35 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ShenZhen DaChengTianXia Information Technology Co., LTD](https://appshunter.io/developer/520764408) | [Infosec](https://appshunter.io/developer/570171119) |

## What reviewers say

### 知识星球

[App page](https://appshunter.io/ios/app/id1039749242)

This app enables users to create and manage private online communities for sharing content like articles, photos, and files. It facilitates easy member invitations and provides robust search functionality within groups. Ideal for fostering focused discussions and knowledge sharing among dedicated followers.

**Highlights:** Create topic-based groups, Invite members via quick link, Post articles, photos, files, URLs, Comment on posts, Search group content by keyword

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10个星球币 | $0.99 | one-time |
| 6 个星球币 | $0.99 | one-time |
| 20个星球币 | $2.99 | one-time |
| 50个星球币 | $6.99 | one-time |
| 68 个星球币 | $9.99 | one-time |
| 100个星球币 | $14.99 | one-time |
| 168个星球币 | $24.99 | one-time |
| 188 个星球币 | $29.99 | one-time |
| 200个星球币 | $29.99 | one-time |
| 368 个星球币 | $49.99 | one-time |
| 400个星球币 | $59.99 | one-time |
| 500个星球币 | $69.99 | one-time |
| 518 个星球币 | $69.99 | one-time |
| 800个星球币 | $99.99 | one-time |

**What reviewers like**

- 🌟 Informative content
- 💡 Interesting concept
- 👍 Useful for content creators

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔒 Lack of security and user protection
- 💰 Overpriced with poor value
- 👥 Difficult to use and navigate
- 🚫 Censorship and content restrictions

**Reported bugs**

- Unable to join or access certain content
- Push notifications not working as expected
- Audio/video playback issues
- Login and registration problems
- Compatibility issues on older devices

**Requested features**

- Add mobile number login option
- Improve search and discovery of content
- Implement refund and customer support system
- Provide dark mode for better readability
- Allow users to block/mute unwanted content


### iSecSP

[App page](https://appshunter.io/ios/app/isecsp/id1638866598)

**In-app purchases:** none


## Frequently asked questions

### Is 知识星球 free?

知识星球 is free to download, with in-app purchases available.

### Is iSecSP free?

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

### Do 知识星球 or iSecSP have ads?

Neither 知识星球 nor iSecSP shows ads.

### Which is updated more often, 知识星球 or iSecSP?

知识星球 ships an update every 2 weeks, and iSecSP every 3 months. Most recently, 知识星球 was updated on September 26, 2026 and iSecSP on September 18, 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.*