# Currency Professional vs SmartKey

The clearest difference is in-app purchases: SmartKey at none against Currency Professional's 1. SmartKey also leads on iOS requirement (18.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Currency Professional sells 1 one-off in-app purchase. SmartKey asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | Currency Professional | SmartKey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Size | 21 MB | 22 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gerhard Lentschik](https://appshunter.io/developer/629988041) | [SmartKey s.r.o.](https://appshunter.io/developer/1515904395) |

## What reviewers say

### Currency Professional

[App page](https://appshunter.io/ios/app/currency-professional/id1493772243)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertising | $1.99 | one-time |


### SmartKey

[App page](https://appshunter.io/ios/app/smartkey-manager/id6462880301)

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

**In-app purchases:** none


## Frequently asked questions

### Is Currency Professional free?

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

### Is SmartKey free?

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

### Do Currency Professional or SmartKey have ads?

Neither Currency Professional nor SmartKey shows ads.

### Which is updated more often, Currency Professional or SmartKey?

Currency Professional ships an update every 5 months, and SmartKey every 5 months. Most recently, Currency Professional was updated on November 7, 2026 and SmartKey on November 7, 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.*