# C6协同v3.9 vs Viewly AI

The clearest difference is in-app purchases: C6协同v3.9 at none against Viewly AI's 3. C6协同v3.9 also leads on iOS requirement (7.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Viewly AI sells 3 in-app purchases, starting at $0.99 per month. C6协同v3.9 asks for nothing beyond the download.

C6协同v3.9 ships an update every 3 weeks, Viewly AI every 11 days. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | C6协同v3.9 | Viewly AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Size | 21 MB | 8 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BEIJING JINHER SOFTWARE CO.LTD.](https://appshunter.io/developer/473901494) | [勋 李](https://appshunter.io/developer/1492204943) |

## What reviewers say

### C6协同v3.9

[App page](https://appshunter.io/ios/app/c6v39/id1173412813)

**Features:** macOS Compatibility

**In-app purchases:** none


### Viewly AI

[App page](https://appshunter.io/ios/app/viewly-ai-image-recognition/id6705124001)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly | $0.99 | per month |
| Pro Monthly | $2.69 | per month |
| Pro Yearly | $24.99 | per year |


## Frequently asked questions

### Is C6协同v3.9 free?

C6协同v3.9 is free to download, with no in-app purchases.

### Is Viewly AI free?

Viewly AI is free to download, with in-app purchases available.

### Do C6协同v3.9 or Viewly AI have ads?

Neither C6协同v3.9 nor Viewly AI shows ads.

### Which is updated more often, C6协同v3.9 or Viewly AI?

C6协同v3.9 ships an update every 3 weeks, and Viewly AI every 11 days. Most recently, C6协同v3.9 was updated on September 17, 2026 and Viewly AI on September 21, 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.*