# Forex Calculator vs koban

The clearest difference is price: koban at Free against Forex Calculator's $5.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

koban is free to download; Forex Calculator costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Forex Calculator ships an update every 2 months, koban every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Forex Calculator | koban |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 25 MB | 37 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Advan inc.](https://appshunter.io/developer/542912248) | [Kaharu Fukushima](https://appshunter.io/developer/1697128447) |

## What reviewers say

### Forex Calculator

[App page](https://appshunter.io/ios/app/forex-calculator-pipopapips/id1595986234)

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

**In-app purchases:** none


### koban

[App page](https://appshunter.io/ios/app/koban/id6451201458)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Forex Calculator free?

Forex Calculator costs $5.99, with no in-app purchases.

### Is koban free?

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

### Do Forex Calculator or koban have ads?

Neither Forex Calculator nor koban shows ads.

### Which is updated more often, Forex Calculator or koban?

Forex Calculator ships an update every 2 months, and koban every 3 months. Most recently, Forex Calculator was updated on November 3, 2026 and koban on November 3, 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.*