# Mo Operation vs Duo Recorder

The clearest difference is in-app purchases: Mo Operation at none against Duo Recorder's 6. Mo Operation also leads on iOS requirement (13.0 vs 16.0). Duo Recorder's advantage is update cadence (every 2 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Duo Recorder sells 6 in-app purchases, starting at $0.99 per 7 days. Mo Operation asks for nothing beyond the download.

Mo Operation ships an update fortnightly, Duo Recorder every 2 days. The most recent releases landed on October 15, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Mo Operation | Duo Recorder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/duo-recorder/id6472632594/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 84 MB | 27 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NextDrive Co.](https://appshunter.io/developer/1005329987) | [百灵 吴](https://appshunter.io/developer/1829336568) |

## What reviewers say

### Mo Operation

[App page](https://appshunter.io/ios/app/mo-operation/id1661910925)

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

**In-app purchases:** none


### Duo Recorder

[App page](https://appshunter.io/ios/app/duo-recorder/id6472632594)

This app offers convenient audio recording with features like voice-to-text and video-to-audio conversion. It allows for private background recording, easy sharing via cloud storage, and organized playback lists for work and study.

**Highlights:** Voice to text conversion, Video to audio conversion, Background recording, Cloud storage, Easy sharing, Customizable playback lists

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一周会员 | $0.99 | per 7 days |
| 连续包月 | $3.99 | per month |
| 一周超级会员 | $0.99 | one-time |
| 一个月黄金会员 | $3.99 | one-time |
| 一年白金会员 | $14.99 | one-time |
| 永久钻石会员 | $29.99 | one-time |


## Frequently asked questions

### Is Mo Operation free?

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

### Is Duo Recorder free?

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

### Do Mo Operation or Duo Recorder have ads?

Neither Mo Operation nor Duo Recorder shows ads.

### Which is updated more often, Mo Operation or Duo Recorder?

Mo Operation ships an update fortnightly, and Duo Recorder every 2 days. Most recently, Mo Operation was updated on October 15, 2026 and Duo Recorder on October 22, 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.*