# 事密达IM vs 知语

The clearest difference is in-app purchases: 知语 at none against 事密达IM's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 事密达IM sells 3 one-off in-app purchases. 知语 asks for nothing beyond the download.

事密达IM ships an update monthly, 知语 every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 事密达IM | 知语 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (8 ratings)](https://appshunter.io/ios/app/im/id6462860670/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 175 MB | 86 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [广州集梦网络科技有限公司](https://appshunter.io/developer/1662413456) | [Yeeya Technology Company](https://appshunter.io/developer/1691252282) |

## What reviewers say

### 事密达IM

[App page](https://appshunter.io/ios/app/im/id6462860670)

Record high-quality audio and video with AI noise reduction for clear sound. This app offers fun voice-changing effects for recordings and allows easy saving and sharing of past audio and video files.

**Highlights:** High-quality audio/video recording, AI noise reduction, Multiple voice-changing effects, Save and share recordings, Clear and bright audio quality

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个月vip | $9.99 | one-time |
| 3个月vip | $29.99 | one-time |
| 6个月vip | $59.99 | one-time |


### 知语

[App page](https://appshunter.io/ios/app/id6529533179)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 事密达IM free?

事密达IM is free to download, with in-app purchases available.

### Is 知语 free?

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

### Do 事密达IM or 知语 have ads?

Neither 事密达IM nor 知语 shows ads.

### Which is updated more often, 事密达IM or 知语?

事密达IM ships an update monthly, and 知语 every 2 months. Most recently, 事密达IM was updated on November 3, 2026 and 知语 on October 30, 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.*