# C3 vs InterviewCopilotPro

The clearest difference is in-app purchases: C3 at none against InterviewCopilotPro's 2. C3 also leads on iOS requirement (12.0 vs 15.0). InterviewCopilotPro's advantage is update cadence (every 5 days vs monthly) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. InterviewCopilotPro sells 2 in-app purchases, starting at $2.99 per month. C3 asks for nothing beyond the download.

C3 ships an update monthly, InterviewCopilotPro every 5 days. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | C3 | InterviewCopilotPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Size | 73 MB | 13 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Dashi Iot Technology Co.,Ltd](https://appshunter.io/developer/1598852202) | [智超 张](https://appshunter.io/developer/1726037177) |

## What reviewers say

### C3

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

**Features:** macOS Compatibility

**In-app purchases:** none


### InterviewCopilotPro

[App page](https://appshunter.io/ios/app/interviewcopilotpro/id6479209129)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $2.99 | per month |
| Annual subscription | $14.99 | per year |


## Frequently asked questions

### Is C3 free?

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

### Is InterviewCopilotPro free?

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

### Do C3 or InterviewCopilotPro have ads?

Neither C3 nor InterviewCopilotPro shows ads.

### Which is updated more often, C3 or InterviewCopilotPro?

C3 ships an update monthly, and InterviewCopilotPro every 5 days. Most recently, C3 was updated on September 16, 2026 and InterviewCopilotPro on September 9, 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.*