# C vs Seffo

The clearest difference is update cadence: Seffo at monthly against C's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

C ships an update every 4 months, Seffo monthly. The most recent releases landed on October 13, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | C | Seffo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 33 MB | 46 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [CASIO COMPUTER CO., LTD.](https://appshunter.io/developer/456569836) | [Xilligence](https://appshunter.io/developer/1736939495) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-mirroring/id6464287342)

**In-app purchases:** none


### Seffo

[App page](https://appshunter.io/ios/app/seffo/id6741413198)

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

**In-app purchases:** none


## Frequently asked questions

### Is C free?

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

### Is Seffo free?

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

### Do C or Seffo have ads?

Neither C nor Seffo shows ads.

### Which is updated more often, C or Seffo?

C ships an update every 4 months, and Seffo monthly. Most recently, C was updated on October 13, 2026 and Seffo on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*