# 求知 vs 灵光

The clearest difference is ads: 灵光 at none against 求知's shown. 求知's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

求知 ships an update every 10 days, 灵光 every 9 days. The most recent releases landed on September 12, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 求知 | 灵光 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.9 (76 ratings)](https://appshunter.io/ios/app/ai/id6751496092/reviews)** |
| Number of ratings | — | **76** |
| Positive reviews | — | 77.5% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | — | Free |
| Size | 94 MB | 271 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [常州乐活旅游投资有限公司](https://appshunter.io/developer/1023257601) | [Alipay (Hangzhou) Technology Co., Ltd.](https://appshunter.io/developer/333206292) |

## What reviewers say

### 求知

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

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

**In-app purchases:** none


### 灵光

[App page](https://appshunter.io/ios/app/ai/id6751496092)

This AI assistant integrates language, image, voice, and data understanding to generate multimodal outputs like 3D models, audio, charts, and animations. It offers features for quick app generation, interactive learning, and intelligent visual exploration, making complex information simple.

**Highlights:** Generate interactive apps in 30 seconds, Visualize complex knowledge with 3D models, illustrations, and animations, Understand and generate images and videos, Real-time scene understanding and visual Q&A, Interactive maps for planning and exploration, Summarize financial reports and documents

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

**In-app purchases:** none


## Frequently asked questions

### Is 求知 free?

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

### Is 灵光 free?

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

### Do 求知 or 灵光 have ads?

求知 shows ads; 灵光 does not.

### Which is updated more often, 求知 or 灵光?

求知 ships an update every 10 days, and 灵光 every 9 days. Most recently, 求知 was updated on September 12, 2026 and 灵光 on September 26, 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.*