# C3 vs AI智慧护耳

C3 and AI智慧护耳 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.

C3 ships an update monthly, AI智慧护耳 every 3 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | C3 | AI智慧护耳 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 64 MB | 28 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Shenzhen Dashi Iot Technology Co.,Ltd](https://appshunter.io/developer/1598852202) | [国 李](https://appshunter.io/developer/1723374835) |

## What reviewers say

### C3

[App page](https://appshunter.io/ios/app/c3-plus/id1598852200)

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

**In-app purchases:** none


### AI智慧护耳

[App page](https://appshunter.io/ios/app/ai/id6475162795)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is C3 free?

C3 is free to download, with no in-app purchases.

### Is AI智慧护耳 free?

AI智慧护耳 is free to download, with no in-app purchases.

### Do C3 or AI智慧护耳 have ads?

Neither C3 nor AI智慧护耳 shows ads.

### Which is updated more often, C3 or AI智慧护耳?

C3 ships an update monthly, and AI智慧护耳 every 3 weeks. Most recently, C3 was updated on October 30, 2026 and AI智慧护耳 on October 25, 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.*