# Roman Numeral vs Si4Keyboard

The clearest difference is ads: Si4Keyboard at none against Roman Numeral's shown. Si4Keyboard also leads on update cadence (fortnightly vs every 69 months). Roman Numeral's advantage is iOS requirement (14.1 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Roman Numeral costs $0.99 and Si4Keyboard $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Roman Numeral ships an update every 69 months, Si4Keyboard fortnightly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Roman Numeral | Si4Keyboard |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/roman-numeral/id637332796/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 69 months | **Fortnightly** |
| Monetization | Ad-supported | — |
| Size | 16 MB | 14 MB |
| Requires iOS | **14.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [H Valeur](https://appshunter.io/developer/621824042) | [文焕 陈](https://appshunter.io/developer/1810161184) |

## What reviewers say

### Roman Numeral

[App page](https://appshunter.io/ios/app/roman-numeral/id637332796)

Easily convert between standard numbers and Roman numerals. Input a numeric value to see its Roman numeral equivalent, or input a Roman numeral to get its numeric form.

**Highlights:** Numeric to Roman numeral conversion, Roman numeral to numeric conversion, Simple and intuitive interface, Supports all standard Roman numerals

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

**In-app purchases:** none


### Si4Keyboard

[App page](https://appshunter.io/ios/app/si4keyboard/id6745263713)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Roman Numeral free?

Roman Numeral costs $0.99, with no in-app purchases.

### Is Si4Keyboard free?

Si4Keyboard costs $0.99, with no in-app purchases.

### Do Roman Numeral or Si4Keyboard have ads?

Roman Numeral shows ads; Si4Keyboard does not.

### Which is updated more often, Roman Numeral or Si4Keyboard?

Roman Numeral ships an update every 69 months, and Si4Keyboard fortnightly. Most recently, Roman Numeral was updated on October 29, 2026 and Si4Keyboard on October 25, 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.*