# 简研 vs O

The clearest difference is update cadence: O at every 2 weeks against 简研's every 5 weeks. 简研's advantage is iOS requirement (10.0 vs 15.0). On price, ads, 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.

简研 ships an update every 5 weeks, O every 2 weeks. The most recent releases landed on September 7, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | 简研 | O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/o-trial-pro/id1658238794/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 101 MB | 56 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shanghai Mudi Biotech Co., Ltd.](https://appshunter.io/developer/1008561790) | [铨融 (苏州)医药科技开发有限公司](https://appshunter.io/developer/1253822764) |

## What reviewers say

### 简研

[App page](https://appshunter.io/ios/app/id1361002001)

**Features:** macOS Compatibility

**In-app purchases:** none


### O

[App page](https://appshunter.io/ios/app/o-trial-pro/id1658238794)

This app provides an information management solution for clinical trials. It aims to streamline trial processes and data handling for medical professionals. The application is designed for use on iPhones and iPods.

**Highlights:** Clinical trial information management, Streamlined trial processes, Data handling for medical professionals, Mobile solution for iPhone and iPod

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

**In-app purchases:** none


## Frequently asked questions

### Is 简研 free?

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

### Is O free?

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

### Do 简研 or O have ads?

Neither 简研 nor O shows ads.

### Which is updated more often, 简研 or O?

简研 ships an update every 5 weeks, and O every 2 weeks. Most recently, 简研 was updated on September 7, 2026 and O on September 1, 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.*