# FlatTax vs CardeaKey

The clearest difference is ads: CardeaKey at none against FlatTax's shown. CardeaKey also leads on update cadence (every 2 months vs every 14 months). FlatTax's advantage is iOS requirement (11.0 vs 13.0). On price, 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.

FlatTax ships an update every 14 months, CardeaKey every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | FlatTax | CardeaKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flattax/id1553543725/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 15 MB | 17 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Centro Studi Informatica di Danilo Priore](https://appshunter.io/developer/409935887) | [Intesa Sanpaolo SPA](https://appshunter.io/developer/489186691) |

## What reviewers say

### FlatTax

[App page](https://appshunter.io/ios/app/flattax/id1553543725)

This app helps self-employed individuals calculate their flat tax liability under Italy's simplified tax regimes. It accounts for different profitability coefficients and reduced rates for new businesses, based on current tax laws.

**Highlights:** Flat tax calculation, Simplified tax regimes, Profitability coefficient adjustment, Reduced rates for new businesses, Supports current tax laws

**Features:** macOS Compatibility

**In-app purchases:** none


### CardeaKey

[App page](https://appshunter.io/ios/app/cardeakey/id1579657507)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FlatTax free?

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

### Is CardeaKey free?

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

### Do FlatTax or CardeaKey have ads?

FlatTax shows ads; CardeaKey does not.

### Which is updated more often, FlatTax or CardeaKey?

FlatTax ships an update every 14 months, and CardeaKey every 2 months. Most recently, FlatTax was updated on October 24, 2026 and CardeaKey on October 27, 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.*