Unit Converter vs XS Modifier Coder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Converter
This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.
- 16 conversion categories
- Custom unit lists
- Live currency exchange rates
- 148 world currencies supported
- User-friendly interface
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Explore our elegant and powerful unit converter with 16 categories, covering almost every unit you can think of. It's user-friendly and allows you to create custom unit lists for each category. Now featuring LIVE exchange rate updates for 148 world currencies! Categories include: Angle Area Cooking Currency Data Length Mileage Power Pressure Speed Temperature Time Volume Weight Men's shoe size Women's shoe size Note that only four categories are unlocked by default. To access all 16, simply purchase the "Pro Features" In-App. Stay connected for up-to-date currency exchange rates; an internet connection is required. Elevate your conversion experience with our versatile unit converter.
XS Modifier Coder
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XS Modifier Coder helps medical coders, billers, and healthcare professionals quickly identify CPT code combinations that may require modifier XS based on CMS National Correct Coding Initiative (NCCI) Procedure-to-Procedure (PTP) edit data. Features: • Uses current CMS NCCI PTP edit data • Fast CPT code entry and analysis • Quick CPT code buttons for commonly used codes • Customizable quick code list • Valid CPT code verification • Highlights CPT codes that may require modifier XS • Simple and easy-to-use interface • Designed for dermatology, surgical, and procedural coding workflows This application is intended for educational and coding reference purposes only. Users are responsible for verifying payer-specific requirements and ensuring coding compliance. CMS guidance and payer policies may change over time. This application is not affiliated with, endorsed by, or sponsored by the Centers for Medicare & Medicaid Services (CMS).
Screenshots
Verdict
The clearest difference is price: Unit Converter at Free against XS Modifier Coder's $0.99. Unit Converter also leads on iOS requirement (17.6 vs 26.5). XS Modifier Coder's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 3 months). On ads 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
Unit Converter is free to download; XS Modifier Coder costs $0.99 up front. Unit Converter sells 1 one-off in-app purchase. XS Modifier Coder asks for nothing beyond the download.
Unit Converter ships an update every 3 months, XS Modifier Coder monthly. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | Unit Converter | XS Modifier Coder |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.6 (16K ratings) — better | — |
| Positive reviews | 33.9% of reviews | — |
| Number of ratings | 16K — better | — |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 26.5 |
| Further details — not scored | ||
| Size | 11 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Tue Nguyen Minh | Joseph Gadzia |
Bugs and requests
Unit Converter
Reported bugs
3 issues- Conversion results not always accurate
- App freezes or crashes on some devices
- Purchased features not always accessible
Requested features
4 requests- Add calculator functionality
- Improve currency conversion
- Provide more unit categories
- Allow creating custom formulas
XS Modifier Coder
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Unit Converter
- Pro Features$2.99
XS Modifier Coder
No in-app purchases





