# Linker拜访 vs eCOA

The clearest difference is in-app purchases: eCOA at none against Linker拜访's 4. eCOA also leads on ads (none vs shown). Linker拜访's advantage is update cadence (fortnightly vs monthly). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Linker拜访 sells 4 one-off in-app purchases. eCOA asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Linker拜访 against 5.0 for eCOA. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Linker拜访 ships an update fortnightly, eCOA monthly. The most recent releases landed on September 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Linker拜访 | eCOA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/linker/id1451038565/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/ecoa/id1599236633/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 120 MB | 69 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [北京元和圣通科技发展有限责任公司](https://appshunter.io/developer/1451038564) | [EClinCloud (Shenzhen) Technology Co., Ltd](https://appshunter.io/developer/1572780199) |

## What reviewers say

### Linker拜访

[App page](https://appshunter.io/ios/app/linker/id1451038565)

This app provides comprehensive management for business visits, tracking who, where, when, and what occurred during each interaction. It streamlines the entire visit process for professional use.

**Highlights:** 4W model tracking (who, where, when, what), Scientific tracking of visit details, Professional visit process management, Streamlined business interactions

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 花费1元打赏给直播中的讲师 | $0.99 | one-time |
| 花费8元打赏给直播中的讲师 | $0.99 | one-time |
| 花费6元打赏给直播中的讲师 | $0.99 | one-time |
| 花费12元打赏给直播中的讲师 | $1.99 | one-time |


### 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


## Frequently asked questions

### Is Linker拜访 free?

Linker拜访 is free to download, with in-app purchases available.

### Is eCOA free?

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

### Which has better reviews, Linker拜访 or eCOA?

Linker拜访 and eCOA are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Linker拜访 or eCOA have ads?

Linker拜访 shows ads; eCOA does not.

### Which is updated more often, Linker拜访 or eCOA?

Linker拜访 ships an update fortnightly, and eCOA monthly. Most recently, Linker拜访 was updated on September 16, 2026 and eCOA 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.*