Comparison

Prime Unit 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

Prime Unit Converter

Features
Read full description

Prime Unit Converter - Your All-in-One Conversion Tool Convert any unit with ease using Prime Unit Converter – the professional and modern unit conversion app trusted by users worldwide. Whether you’re handling length, weight, temperature, currency, or scientific units, this app provides instant, accurate conversions in a beautifully designed interface. Key Features: - Supports over 1000 units across categories like length, weight, temperature and more - Clean, professional design for fast and intuitive use - Offline mode for most conversions - Built-in calculator for combined calculations - Favourite units for quick access - Ad-free premium experience (optional upgrade) Why Choose Prime Unit Converter? - Professional-grade accuracy for students, professionals, travelers, and scientists - Designed for speed and simplicity without compromising power - Fully customizable for your needs - Regular updates with new units and features Download Prime Unit Converter today and simplify all your conversions – the smart choice for professionals and everyday users alike.

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

Prime Unit Converter4 screens
Unit Converter Engineering Pro3 screens

Verdict

The call

The clearest difference is in-app purchases: Prime Unit Converter at none against Unit Converter Engineering Pro's 2. Unit Converter Engineering Pro's advantage is iOS requirement (13.0 vs 16.6). On price, 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

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. Prime Unit Converter asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Prime Unit Converter versus Unit Converter Engineering Pro: the parameters behind the verdict, then further details
ParameterPrime Unit ConverterUnit Converter Engineering Pro
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Weekly
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size1 MB77 MB
Age rating4+4+
DeveloperNirav ParmarKaiguri Tech

In-app purchases

None

Prime Unit 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 Prime Unit Converter free?
Prime Unit 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.
Do Prime Unit Converter or Unit Converter Engineering Pro have ads?
Neither Prime Unit Converter nor Unit Converter Engineering Pro shows ads.

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