Comparison

Units Converter+ vs Unit Converter Engineering Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Units Converter+

This free utility tool helps you convert between over 400 units across more than 20 categories. It features a simple interface, fast calculations, and automatic updates for currency exchange rates.

Highlights
  • Over 400 units
  • 20+ conversion categories
  • Simple and easy UI
  • Fast calculations
  • Latest currency rates
  • Automatic currency updates
  • Mixed-unit support
Features
Read full description

Use this FREE unit-converting tool to convert across 20+ categories and more than 400 plus units. Features: • More than 20 categories and over 400+ units • FREE • Simple, easy to use UI • Fast calculation • Latest currency rates • Automatic update of currency exchange rate • Mixed-Unit Support Categories: Acceleration, Angle, Area, Bytes, Currency, Current, Energy, Force, Illumination, Inductance, Length, Magnitude, Mass, Power, Pressure, Radiation, Temperature, Time, Torque, Velocity, Volume Examples of Units: Feet, Inches, Rand, Yen, Dollar, Sterling, Pound, Ruppee, Dirham, G-Force, Galileo, Kelvin, Fahrenheit, Celsius, Acres, Hectares, Yards, GB, MB, TB, Electro Magnetic, Calories, Volt, Watt, Newton, Poundal, Nox, Phots, Electro Static, Nano, Micro, Horse Power, Grams, Pounds, Ounces, Tonnes, Stones, Pascal, Curies, Light, Knots, Bushels, Cubic Feet, Gallons, Liters, Pint, Quarts, Tablespoons, Teaspoons Now convert easily and quickly, from imperial to metric and vice versa with your favorite and fastest unit converter app.

About

Unit Converter Engineering Pro

This app provides precise unit conversions for engineers, scientists, and students. It supports over 100 units across 35 categories, including scientific notation and 9-digit decimal precision. The tool works offline and adheres to SI, NIST, and ISO standards.

Highlights
  • Over 100 units in 35+ categories
  • Scientific notation support
  • 9-digit decimal precision
  • SI, NIST, ISO compliant
  • Offline functionality
  • Specialized units included
Features
Read full description

Unit Converter Engineering Pro – The ultimate tool for engineers, scientists, and students who need precise and fast unit conversions. Easily convert between over 100 units across more than 35 categories commonly used in engineering, physics, chemistry, and mathematics. Perfect for professionals, researchers, and students who want a reliable, professional-grade converter at their fingertips. Included categories: • Acceleration • Angle • Area • Specific Heat • Electric Charge • Heat Transfer Coefficient • Length • Concentration • Thermal Conductivity • Physical Constants • Density • Diffusivity • Energy • Heat Flux • Force • Illuminance • Luminance • Mass • Moment / Torque • Power • ppm / ppb / ppt / % • SI Prefix • Pressure • Radiation – Activity • Radiation – Dose • Radiation – Exposure • Radiation – Equivalent Dose • Time • Volume • Velocity / Speed • Viscosity • Volume Flow Rate • Voltage / Electric Potential • Frequency • Temperature Key Features: • Supports scientific notation for extreme precision • Fully compliant with SI, NIST, and ISO standards • 9-digit decimal precision for engineering-grade accuracy • Fast and intuitive interface • Works offline – no internet required • Includes rare and specialized units often missing from other converters • Made by engineers, for engineers Simplify your work, save time, and ensure accuracy with Unit Converter Engineering Pro - your professional unit conversion companion. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Units Converter+4 screens
Unit Converter Engineering Pro3 screens

Verdict

The call

The clearest difference is in-app purchases: Units Converter+ at none against Unit Converter Engineering Pro's 2. Units Converter+ also leads on iOS requirement (10.0 vs 13.0). Unit Converter Engineering Pro's advantage is update cadence (weekly vs monthly). On price, rating, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Unit Converter Engineering Pro sells 2 in-app purchases, starting at $5.99 per 7 days. Units Converter+ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Units Converter+ against 5.0 for Unit Converter Engineering Pro. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Units Converter+ ships an update monthly, Unit Converter Engineering Pro weekly. The most recent releases landed on September 21, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
Units Converter+ versus Unit Converter Engineering Pro: the parameters behind the verdict, then further details
ParameterUnits Converter+Unit Converter Engineering Pro
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews83.3% of reviews—
Number of ratings11
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better13.0
Further details — not scored
Size5 MB77 MB
Age rating4+4+
DeveloperFusion Software Development Pty LtdKaiguri Tech

Customer experience

Units Converter+

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Unit Converter Engineering Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Units Converter+

No in-app purchases

2 purchases

Unit Converter Engineering Pro

Subscriptions2
  • 3-Day Trial3 Days trial$5.997 Days
  • Yearly Plan$19.991 Year

Questions

Is Units Converter+ free?
Units Converter+ is free to download, with no in-app purchases.
Is Unit Converter Engineering Pro free?
Unit Converter Engineering Pro is free to download, with in-app purchases available.
Which has better reviews, Units Converter+ or Unit Converter Engineering Pro?
Units Converter+ and Unit Converter Engineering Pro are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Units Converter+ or Unit Converter Engineering Pro have ads?
Neither Units Converter+ nor Unit Converter Engineering Pro shows ads.
Which is updated more often, Units Converter+ or Unit Converter Engineering Pro?
Units Converter+ ships an update monthly, and Unit Converter Engineering Pro weekly. Most recently, Units Converter+ was updated on September 21, 2026 and Unit Converter Engineering Pro on October 2, 2026.

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