SI To USCS unit Conversion vs Captain Code NEC Code Changes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SI To USCS unit Conversion
This app facilitates quick unit conversions between SI and USCS/Imperial systems for engineering applications. It covers 18 major categories, including mass, length, volume, and thermodynamics properties. Users can input data and generate conversion tables.
- SI to USCS/Imperial unit conversion
- 18 major unit categories
- Engineering and applied science focus
- Data input and conversion
- Conversion table generation
- Gas flow rate conversion
Read full descriptionHide full description
UnitConv app helps in quick unit conversion from SI units to USCS/Imperial and vice verse for most of the units associated in engineering conventions and computations. Therefore, App can be very handy for engineers and students dealing with subjects such as thermodynamics, fluid mechanics, heat transfers and other applied engineering subjects where property data requires frequent conversion. This app covers units under following18 major categories. 1. Mass (kg, lbm, slug, ounce, grain, M. Tonne, Ton) 2. Length (meter, ft, cm, in, mm, km, mile) 3. Area (m^2, ft^2, cm^2, in^2) 4. Volume (liter, gal (US), gal (UK), m^3. ft^3, fl_oz) 5. Temperature (deg C, deg F, Kelvin, Rankin) 6. Flow rate (lpm, gpm, cc/sec, ci/sec) 7. Force (Newton, dyne, kgf, lbf) 8. Pressure (kPa, Bar, psi, atm, kgf/cm^2, in_wg, mm_Hg ) 9. Velocity (m/sec. ft/sc, kmh, mph) 10. Energy (Joule, cal, BTU, m.kgf, ft.lbf) 11. Power (kW, hp, kcal/s, BTU/hr, kgf.m/s, lbf.ft/s) 12. Density (kg/m^3, lb/ft^3, m/cc, lbf.sec^2/in^4) 13. Dynamic Viscosity (Pa.sec, poise, cP, reyn, kgf.sec/m^2, lbf.sec/ft^2) 14. Kinematic viscosity (stokes, cSt, newts) 15. Specific heat (joule/kg.K, BTU/lb.F, cal/kg.C) 16. Thermal Conductivity (W/m.K, BTU/hr.ft.F) 17. Enthalpy (kJ/kg, BTU/lb) 18. Entropy (kJ/kg.K, BTU/hr.R) By default, the app provides the conversion factor for units listed above. However, users can enter in any data and then convert its value in the chosen unit from the picker. In addition app generates a conversion table for the chosen unit. The following screen shots illustrate this for pressure as an example. There is a separate section under Flow Rate category for gas flow rate conversion. One can quickly convert gas flow rate in Slpm to Scfm and vice verse as shown in the screen shot. With Best Compliments From: Kaup Shenoy Associates.
Captain Code NEC Code Changes
This app provides electrical professionals with up-to-date National Electrical Code information. It offers searchable access to code changes, expert analysis, and manufacturer insights, complete with illustrations to aid comprehension.
- Searchable by market vertical, product, or article number
- Direct NEC text extraction
- Expert analysis from IAEI
- Manufacturer input for code intent
- Includes photos and illustrations
- Tracks code changes from 2014-2023
Read full descriptionHide full description
"National Electrical Code® (NEC®) compliance is paramount for all electrical professionals as noncompliance can mean costly rework and lost productivity. The best solution for staying current on the NEC is the New Leviton Captain Code® App. This easy to use, information tool is searchable by market vertical, product number, or article number. The App allows you to quickly identify and review code changes as it draws from three perspectives to provide clear and comprehensive Code data: • Actual NEC text extracted directly from the NFPA 70 document • Clear Analysis from the Code experts at the International Associational of Electrical Inspectors® (IAEI®). Their analysis simplifies complicated passages and enables better understanding. • Manufacturers input (Leviton) to further explain Code intent and identify specific solutions for compliance. The 2020 Captain Code App includes photos and illustrations to complement the text and enable readers to quickly comprehend the NEC’s intent. The App is intended for use by Electrical Contractors, Electrical Inspectors, Specification Engineers, MRO’s and all electrical professionals. Download the Leviton Captain Code App and see how easy it can be to keep up with the Code!"
Screenshots
Verdict
The clearest difference is review sentiment: SI To USCS unit Conversion at 100% against Captain Code NEC Code Changes's 33%. SI To USCS unit Conversion also leads on rating (5.0 vs 3.4) and ads (none vs shown). Captain Code NEC Code Changes's advantage is update cadence (every 4 months vs every 10 months) and ratings volume (5 vs 1). 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.
SI To USCS unit Conversion holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Captain Code NEC Code Changes has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of SI To USCS unit Conversion's written reviews are positive against 33% of Captain Code NEC Code Changes's.
SI To USCS unit Conversion ships an update every 10 months, Captain Code NEC Code Changes every 4 months. Both last shipped on June 10, 2026.
| Parameter | SI To USCS unit Conversion | Captain Code NEC Code Changes |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.4 (5 ratings) |
| Positive reviews | 100.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 10 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.3 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Muralidhar Shenoy | Leviton Manufacturing Co. Inc. |
Customer experience
SI To USCS unit Conversion
Captain Code NEC Code Changes
In-app purchases
SI To USCS unit Conversion
No in-app purchases
Captain Code NEC Code Changes
No in-app purchases
Questions
Is SI To USCS unit Conversion free?
Is Captain Code NEC Code Changes free?
Which has better reviews, SI To USCS unit Conversion or Captain Code NEC Code Changes?
Do SI To USCS unit Conversion or Captain Code NEC Code Changes have ads?
Which is updated more often, SI To USCS unit Conversion or Captain Code NEC Code Changes?
Other comparisons









