Roman Numeral vs SourceCanvas
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Roman Numeral
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.
- Numeric to Roman numeral conversion
- Roman numeral to numeric conversion
- Simple and intuitive interface
- Supports all standard Roman numerals
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Roman Numerals are a "number system" that uses a combination of letters to express a number. This App will make it easier to process Roman Numerals. The Roman Numerals App can do two things very well: First, if you have a Numeric Number, this App will convert it into a Roman Numeral. Second, if you have Roman Numeral, this App will convert it into a Numeric Number.
SourceCanvas
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SourceCanvas is a local editor for SVG, Mermaid, Graphviz DOT, and PlantUML diagrams on iPhone, iPad, Mac, and Apple Vision Pro. Start free • Create, edit, and preview SVG diagrams. • Open, edit, and save source files in all four formats. Your documents remain accessible without a purchase. • Try each non-SVG renderer once for 10 continuous minutes per device. Its timer starts after the first successful render. Lifetime Pro • Unlock explicit SVG, PNG 1×/2×/3×, and vector PDF exports. • Use nonblank templates and full Mermaid, Graphviz, and PlantUML previews after each trial. • On Mac, use the MCP Agent and native AI Preview with compatible local AI hosts. Lifetime Pro is a one-time in-app purchase, not a subscription. Customers who obtained the paid app before the free transition automatically keep equivalent Legacy Pro access. Purchase directly on iPhone, iPad, Mac, or Apple Vision Pro. Restore on another device with the same Apple Account. Rendering runs locally. No account or remote rendering service is required. External SVG resources are blocked unless you choose to allow them.
Screenshots
Verdict
The clearest difference is ads: SourceCanvas at none against Roman Numeral's shown. SourceCanvas also leads on update cadence (every 3 weeks vs every 69 months). Roman Numeral's advantage is iOS requirement (14.1 vs 18.6). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Roman Numeral ships an update every 69 months, SourceCanvas every 3 weeks. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.
| Parameter | Roman Numeral | SourceCanvas |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 69 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 14.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 16 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | H Valeur | 音建 何 |
In-app purchases
Roman Numeral
No in-app purchases
SourceCanvas
No in-app purchases
Questions
Is Roman Numeral free?
Is SourceCanvas free?
Do Roman Numeral or SourceCanvas have ads?
Which is updated more often, Roman Numeral or SourceCanvas?
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