# 上下求索 vs 求知

The clearest difference is in-app purchases: 求知 at none against 上下求索's 5. 求知 also leads on update cadence (every 10 days vs every 6 weeks) and iOS requirement (12.0 vs 14.0). 上下求索's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 上下求索 sells 5 in-app purchases, starting at $3.99 per month. 求知 asks for nothing beyond the download.

上下求索 ships an update every 6 weeks, 求知 every 10 days. The most recent releases landed on July 27, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | 上下求索 | 求知 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 105 MB | 94 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [亿有引力](https://appshunter.io/developer/1787379474) | [常州乐活旅游投资有限公司](https://appshunter.io/developer/1023257601) |

## What reviewers say

### 上下求索

[App page](https://appshunter.io/ios/app/ai/id6741800737)

This intelligent assistant supports voice, text, and image input for Q&A and inspiration. Explore bite-sized knowledge, generate unique photos with the Time Gallery, and engage in follow-up questions for deeper understanding.

**Highlights:** Voice, text, and image input, Follow-up questions, Extended reading content, Bite-sized Knowledge module, Time Gallery photo generation, Task list and result page

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Creation Monthly | $3.99 | per month |
| 50 张图片加量包 | $0.99 | one-time |
| 50 Coins | $0.99 | one-time |
| 170 Coins | $3.99 | one-time |
| 420 Coins | $9.99 | one-time |


### 求知

[App page](https://appshunter.io/ios/app/ai/id6743887031)

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

**In-app purchases:** none


## Frequently asked questions

### Is 上下求索 free?

上下求索 is free to download, with in-app purchases available.

### Is 求知 free?

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

### Do 上下求索 or 求知 have ads?

求知 shows ads; 上下求索 does not.

### Which is updated more often, 上下求索 or 求知?

上下求索 ships an update every 6 weeks, and 求知 every 10 days. Most recently, 上下求索 was updated on July 27, 2026 and 求知 on September 12, 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.*