# AI.A vs 知己

The clearest difference is in-app purchases: 知己 at none against AI.A's 4. 知己 also leads on update cadence (every 3 days vs every 3 weeks). AI.A's advantage is iOS requirement (17 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. AI.A sells 4 in-app purchases, starting at $0.99 per 7 days. 知己 asks for nothing beyond the download.

AI.A ships an update every 3 weeks, 知己 every 3 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AI.A | 知己 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 5 MB | 8 MB |
| Requires iOS | **17** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [飞 张](https://appshunter.io/developer/1806832521) | [伟烈 熊](https://appshunter.io/developer/6792607821) |

## What reviewers say

### AI.A

[App page](https://appshunter.io/ios/app/aia/id6757102303)

This investment tool helps organize market information and provides intelligent analysis. It offers features like new stock calendars, hot stock tracking, fund flow data, and AI-powered real-time interpretations of stock and industry news to identify potential investments and understand market shifts.

**Highlights:** New stock calendar, Hot stock tracking, Fund flow and turnover rankings, AI real-time interpretation, Industry news analysis, Market trend monitoring

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $0.99 | per 7 days |
| 月会员 | $2.99 | per month |
| 年会员 | $9.99 | per year |
| 永久会员 | $12.99 | one-time |


### 知己

[App page](https://appshunter.io/ios/app/ai/id6816163811)

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

**In-app purchases:** none


## Frequently asked questions

### Is AI.A free?

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

### Is 知己 free?

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

### Do AI.A or 知己 have ads?

Neither AI.A nor 知己 shows ads.

### Which is updated more often, AI.A or 知己?

AI.A ships an update every 3 weeks, and 知己 every 3 days. Most recently, AI.A was updated on November 5, 2026 and 知己 on October 31, 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.*