# eCOA vs 卓信签Pro

The clearest difference is iOS requirement: 卓信签Pro at 10.0 against eCOA's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

eCOA ships an update monthly, 卓信签Pro every 2 months. Both last shipped on September 15, 2026.

## The numbers

| Metric | eCOA | 卓信签Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ecoa/id1599236633/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 69 MB | 12 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [EClinCloud (Shenzhen) Technology Co., Ltd](https://appshunter.io/developer/1572780199) | [Shandong Zhuoma Information Technology Co., Ltd.](https://appshunter.io/developer/1484067461) |

## What reviewers say

### eCOA

[App page](https://appshunter.io/ios/app/ecoa/id1599236633)

This app facilitates real-time patient feedback collection during clinical trials. It streamlines the process of gathering accurate patient input to speed up drug development, offering features like easy login and timely reminders.

**Highlights:** Real-time patient feedback, Clinical trial data collection, Patient-centered design, Easy login, User training, Scale completion, Timely reminders

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

**In-app purchases:** none


### 卓信签Pro

[App page](https://appshunter.io/ios/app/pro/id1610080599)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eCOA free?

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

### Is 卓信签Pro free?

卓信签Pro is free to download, with no in-app purchases.

### Do eCOA or 卓信签Pro have ads?

Neither eCOA nor 卓信签Pro shows ads.

### Which is updated more often, eCOA or 卓信签Pro?

eCOA ships an update monthly, and 卓信签Pro every 2 months. Most recently, eCOA was updated on September 15, 2026 and 卓信签Pro on September 15, 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.*