# MCSign vs Fidoo FX Key

The clearest difference is iOS requirement: Fidoo FX Key at 13.0 against MCSign's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

MCSign ships an update every 7 months, Fidoo FX Key every 9 months. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | MCSign | Fidoo FX Key |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 9 months |
| Size | 103 MB | 15 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ceska sporitelna, a.s.](https://appshunter.io/developer/469812790) | [Direct Fidoo a.s.](https://appshunter.io/developer/989241352) |

## What reviewers say

### MCSign

[App page](https://appshunter.io/ios/app/mcsign/id6476927526)

**In-app purchases:** none


### Fidoo FX Key

[App page](https://appshunter.io/ios/app/fidoo-fx-key/id6483930389)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MCSign free?

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

### Is Fidoo FX Key free?

Fidoo FX Key is free to download, with no in-app purchases.

### Do MCSign or Fidoo FX Key have ads?

Neither MCSign nor Fidoo FX Key shows ads.

### Which is updated more often, MCSign or Fidoo FX Key?

MCSign ships an update every 7 months, and Fidoo FX Key every 9 months. Most recently, MCSign was updated on November 4, 2026 and Fidoo FX Key on November 8, 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.*