Honest comparison · Updated 2026-09-18
Vincula vs Roman Numerals - Converter
Roman Numerals - Converter has been on the App Store for years and is the most-reviewed dedicated Roman numeral app around. Vincula is the newer, more focused take — one field, two-way conversion, built for dates and engravings. Here's how they actually differ.
Dimension-by-dimension
| Dimension | Vincula | Roman Numerals - Converter | Edge |
|---|---|---|---|
| Core conversion | Type a number or a numeral in one field — Vincula detects which one you typed and converts instantly, both directions. | Also does number-to-numeral and numeral-to-number conversion, in a more traditional two-field layout. | |
| Date formatting | Built-in Roman date styles designed specifically for engravings, tattoos, and anniversaries. | General-purpose converter; no dedicated date-formatting mode. | |
| Large numbers | Vinculum notation (overline) supports numbers up to 3,999,999 with Pro. | Standard Roman numeral range only, no vinculum extension. | |
| Pricing | Free with a one-time Pro unlock for vinculum notation, date styles, and unlimited history. | Completely free, no in-app purchases. |
Vincula advantage · Roman Numerals - Converter advantage · roughly equal
Where Vincula wins
- Built for engravings and tattoos, not just homework. The date-style formatting and shareable card export are aimed at a real use case (rings, plaques, tattoos) that a generic converter doesn't address.
- Vinculum notation for big numbers. Most converters cap out around 3,999 (MMMCMXCIX); Vincula's Pro tier extends to millions using proper overline notation.
Where Roman Numerals - Converter wins
- Established and free. No purchases required, and years of ratings back up that it works as expected for straightforward conversion.
Pick Vincula if…
You need Roman numerals for a specific real-world purpose — an engraving, a tattoo, a date on a plaque — and want proper large-number notation.
See VinculaPick Roman Numerals - Converter if…
You just need a quick, no-strings-attached number-to-numeral lookup and don't need the extras.
Visit Roman Numerals - Converter siteBoth do the core conversion correctly. The difference is what you're converting for.
Frequently asked questions
What's the main difference between Vincula and Roman Numerals - Converter?+
Roman Numerals - Converter has been on the App Store for years and is the most-reviewed dedicated Roman numeral app around. Vincula is the newer, more focused take — one field, two-way conversion, built for dates and engravings. Here's how they actually differ.
Should I choose Vincula or Roman Numerals - Converter?+
Pick Vincula if: You need Roman numerals for a specific real-world purpose — an engraving, a tattoo, a date on a plaque — and want proper large-number notation. Pick Roman Numerals - Converter if: You just need a quick, no-strings-attached number-to-numeral lookup and don't need the extras.
What can Vincula do that Roman Numerals - Converter can't?+
Built for engravings and tattoos, not just homework. The date-style formatting and shareable card export are aimed at a real use case (rings, plaques, tattoos) that a generic converter doesn't address. Vinculum notation for big numbers. Most converters cap out around 3,999 (MMMCMXCIX); Vincula's Pro tier extends to millions using proper overline notation.
Where does Roman Numerals - Converter win over Vincula?+
Established and free. No purchases required, and years of ratings back up that it works as expected for straightforward conversion.
How much does Vincula cost compared to Roman Numerals - Converter?+
Vincula: Free with a one-time Pro unlock for vinculum notation, date styles, and unlimited history. Roman Numerals - Converter: Completely free, no in-app purchases.