# 知答 vs 灵图

The clearest difference is iOS requirement: 知答 at 15.6 against 灵图's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 知答 sells 4 one-off in-app purchases and 灵图 sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

知答 ships an update weekly, 灵图 every 5 days. The most recent releases landed on September 30, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 知答 | 灵图 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 77 MB | 17 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [晓生 唐](https://appshunter.io/developer/1680679241) | [Xiamen Xiaoqiaosi Technology Co., Ltd](https://appshunter.io/developer/1098202524) |

## What reviewers say

### 知答

[App page](https://appshunter.io/ios/app/ai-agent/id6739323442)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 购买60个知豆 | $0.99 | one-time |
| 购买180个知豆 | $2.99 | one-time |
| 购买300个知豆 | $3.99 | one-time |
| 购买1680个知豆 | $24.99 | one-time |


### 灵图

[App page](https://appshunter.io/ios/app/ai/id6770206813)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 充值体验积分包 | $0.99 | one-time |
| 充值小额积分包 | $2.99 | one-time |
| 充值标准积分包 | $5.99 | one-time |
| 充值高级积分包 | $9.99 | one-time |
| 充值超值积分包 | $14.99 | one-time |


## Frequently asked questions

### Is 知答 free?

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

### Is 灵图 free?

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

### Do 知答 or 灵图 have ads?

Neither 知答 nor 灵图 shows ads.

### Which is updated more often, 知答 or 灵图?

知答 ships an update weekly, and 灵图 every 5 days. Most recently, 知答 was updated on September 30, 2026 and 灵图 on September 24, 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.*