# 掌上微试 vs O

掌上微试 and O are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

掌上微试 ships an update monthly, O every 4 weeks. Both last shipped on November 2, 2026.

## The numbers

| Metric | 掌上微试 | O |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Size | 73 MB | 28 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Beijing CTS Co.,Ltd](https://appshunter.io/developer/1036091389) | [铨融 (苏州)医药科技开发有限公司](https://appshunter.io/developer/1253822764) |

## What reviewers say

### 掌上微试

[App page](https://appshunter.io/ios/app/id1036091390)

**Features:** Vision Pro support

**In-app purchases:** none


### O

[App page](https://appshunter.io/ios/app/o-trial-plus/id1423521217)

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

**In-app purchases:** none


## Frequently asked questions

### Is 掌上微试 free?

掌上微试 is free to download, with no in-app purchases.

### Is O free?

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

### Do 掌上微试 or O have ads?

Neither 掌上微试 nor O shows ads.

### Which is updated more often, 掌上微试 or O?

掌上微试 ships an update monthly, and O every 4 weeks. Most recently, 掌上微试 was updated on November 2, 2026 and O on November 2, 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.*