MCSign vs Fidoo FX Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MCSign
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The mobile application is designed for prompt and efficient authorization of payment orders sent via the MultiCash system. After registration, the app can be used as an offline cronto code reader for web interface authorization, or you can authorize payment orders directly within the app, in which case data connectivity is required.
Fidoo FX Key
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Introducing the Fidoo FX Key – a mobile app designed specifically for two-factor authentication (2FA) within the “FX and International Payments” web application from Direct Fidoo. With Fidoo FX Key, your transactions are always secure. Log in, authorize payments, add new counterparties, and verify your identity when contacting our customer support using facial recognition or fingerprint. Quickly, easily, reliably. Download the Fidoo FX Key and activate it in the “FX and International Payments” app under the “My Account” section. Manage your finances safely and efficiently.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | MCSign | Fidoo FX Key |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 103 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Ceska sporitelna, a.s. | Direct Fidoo a.s. |
In-app purchases
MCSign
No in-app purchases
Fidoo FX Key
No in-app purchases
