Comparison

Simple Unit Converter vs Conversion Calculator Plus

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

Head to head
About

Simple Unit Converter

Easily convert between a wide range of units for length, area, mass, temperature, volume, and more. This app offers a comprehensive set of conversion tools for everyday and professional use.

Highlights
  • Length conversions
  • Area conversions
  • Mass conversions
  • Temperature conversions
  • Volume conversions
  • Density conversions
  • Flow rate conversions
Features
Read full description

Simple Unit Converter is a convenient app for you to convert all units from basics to professionals listed below: - Length (km, mm, cm, meter, yards, feet, miles, inches) - Area (cm², m², in², ft², mm² yd²) - Mass (kg, grams, pounds, ounces, etc) - Temperature (Celcius, Fahrenheit, Kelvin) - Volume - Density - Volumetric Liquid Flow - Volumetric Gas Flow - Mass Flow - Speed - High Pressure - Low Pressure - Torque - Dynamic Viscosity - Kinematic Viscosity Download Simple Unit Converter app for free now and have fun converting all the measuring units you wish to convert!

About

Conversion Calculator Plus

This app is a versatile unit and currency converter with a user-friendly interface. It supports a wide range of conversion categories, including real-world and crypto currencies, with automatic exchange rate updates. Customize your experience with design options, dark mode, and adjustable home screen layouts.

Highlights
  • Unit and currency conversion
  • Supports 160+ currencies (real & crypto)
  • Automatic currency exchange rate updates
  • Simple or carousel design options
  • Dark Mode support
  • Customizable home screen layout
  • Split screen mode on iPad
Features
Read full description

• No full-page ads. • App works without internet. • Rates Saved for Offline use. • Real-time rates updated every minute. • Fast, accurate conversions across 685 units. • Hide unused units, currencies and categories. • Built-in calculator with +, −, ×, ÷, ( and ). • Supports both light and dark appearance. • Custom Home Screen Widgets. Premium Required • Use Siri to convert. Premium Required • Conversions automatically saved to History. • Save all your favorite conversions in 1 place • Interactive rate charts from 1 day to 5 years, plus all available history. • Expand charts to full screen, pinch to zoom, pan and inspect past rates. ----------------------------------------- ALL CONVERSION CATEGORIES COMMON CATEGORIES Pace, Temperature, Data, Currency, Length, Time, Speed, Area, Volume, Pressure, Power, Fuel Economy and Weight. CURRENCIES, CRYPTO & METALS Convert all world currencies, 125 cryptocurrencies and tokens—including Bitcoin, Ethereum and Tether—and four precious metals: gold, silver, platinum and palladium. Compare multiple currencies in one list with Currency+. NUMBERS & GEOMETRY Angle and Amount. PERSONAL & HEALTH Shoe Sizes, Ring Sizes and Blood Sugar. MOTION & MECHANICS Acceleration, Angular Acceleration, Force, Torque, Energy and Moment of Inertia. FLUIDS & MATERIALS Flow, Density, Viscosity, Kinematic Viscosity, Surface Tension, Permeability, Mass Flux Density and Specific Volume. TEMPERATURE & HEAT Temperature Interval, Thermal Conductivity, Specific Heat Capacity, Heat Density, Heat Flux Density, Heat Transfer Coefficient and Thermal Expansion. ELECTRICITY & MAGNETISM Current, Voltage, Charge, Resistance, Capacitance, Inductance, Conductance, Linear Charge Density, Surface Charge Density, Volume Charge Density, Linear Current Density, Surface Current Density, Electric Field Strength, Electric Resistivity, Electric Conductivity, Magnetic Flux (Magnet), Magnetic Field Strength, Magnetic Flux Density and Magnetomotive Force. LIGHT & SOUND Luminance, Illumination, Luminous Intensity, Sound and Frequency. DATA & DESIGN Data Transfer Rate, Image and Typography. CHEMISTRY & RADIATION Molar Concentration, Molar Mass, Molar Flow Rate, Radiation, Radioactivity and Exposure. PREMIUM Premium is an optional auto-renewing annual subscription. It removes banner ads, gives you more screen space, and unlocks interactive Home Screen widgets and Siri conversions. Payment is charged to your Apple Account when you confirm the purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. The price is shown before you confirm. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://developer-yl.github.io/convert-units-plus/privacy.html

Screenshots

Simple Unit Converter4 screens
Conversion Calculator Plus4 screens

Verdict

The call

The clearest difference is in-app purchases: Simple Unit Converter at none against Conversion Calculator Plus's 1. Simple Unit Converter also leads on ads (none vs shown) and review sentiment (78% vs 70%). Conversion Calculator Plus's advantage is rating (4.7 vs 4.3) and ratings volume (15K vs 221). On price 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. Conversion Calculator Plus sells 1 in-app purchase, starting at $9.99 per year. Simple Unit Converter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Conversion Calculator Plus holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Conversion Calculator Plus has 15K ratings behind it against 221, so its average is the more settled of the two. Written reviews complicate that: 78% of Simple Unit Converter's written reviews are positive against 70% of Conversion Calculator Plus's, so the app with the better star average is not the one people write more warmly about.

Scorecard7 real differences · 3 level
Simple Unit Converter versus Conversion Calculator Plus: the parameters behind the verdict, then further details
ParameterSimple Unit ConverterConversion Calculator Plus
PriceFreeFree
Rating4.3 (221 ratings)4.7 (15K ratings) — better
Positive reviews78.1% of reviews — better69.5% of reviews
Number of ratings22115K — better
Update frequency—Every 2 days
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS6.0 — better17.0
Further details — not scored
Size8 MB59 MB
Age rating4+4+
DeveloperJian Yih LeeAdysseus

Customer experience

Simple Unit Converter

All ratings210 ratings
Positive86.7%
Neutral6.2%
Negative7.1%
Written reviews32 reviews
Positive78.1%
Neutral6.3%
Negative15.6%

Conversion Calculator Plus

All ratings15,343 ratings
Positive94.6%
Neutral2.8%
Negative2.6%
Written reviews200 reviews
Positive69.5%
Neutral4.5%
Negative26.0%

User reviews

Simple Unit Converter

From 221 App Store ratings

What we love

  • 👍 Easy to use
  • 👍 Handy for everyday conversions
  • 👍 Useful for metric/imperial switching
  • 👍 Great for specific conversions (e.g., rugby league)
  • 👍 Simple and straightforward interface

Room to improve

  • ⚠️ Interface can be cumbersome
  • ⚠️ Full of Google advertising
  • ⚠️ Numeric pad not intuitive
  • ⚠️ Cannot enter numbers with leading zero before decimal
  • ⚠️ Limited conversion options for some cuisines

Conversion Calculator Plus

From 15K App Store ratings

What we love

  • 🚀 Great app
  • 👍 Easy to use
  • 🚀 Comprehensive conversions
  • 👍 Intuitive interface
  • 🚀 Useful tool

Room to improve

  • 🐛 Consent required for tracking
  • 🐛 Update problems
  • 🐛 Currency not updating
  • 🔒 Forced to allow tracking
  • 🔒 Forced to subscribe or view ads

Bugs and requests

Simple Unit Converter

Reported bugs

2 issues
  • 🐛 Cannot type in inches (fractions or decimals)
  • 🐛 App doesn't keep inches to feet setting

Requested features

4 requests
  • Allow entry of fractions (e.g., 1/2)
  • Allow entry of numbers with leading zero before decimal (e.g., 0.25)
  • Improve numeric pad layout
  • Expand conversion options for specific needs (e.g., American cuisine)

Conversion Calculator Plus

Reported bugs

3 issues
  • Currency conversion not working
  • App gets stuck on consent page
  • Unable to get past ads/subscription page

Requested features

3 requests
  • Add running pace conversions
  • Add shoe size converter
  • Provide paid ad-free version

In-app purchases

None

Simple Unit Converter

No in-app purchases

1 purchases

Conversion Calculator Plus

Subscriptions1
  • No Ads For One Year1 Year trial$9.991 Year

Questions

Is Simple Unit Converter free?
Simple Unit Converter is free to download, with no in-app purchases.
Is Conversion Calculator Plus free?
Conversion Calculator Plus is free to download, with in-app purchases available.
Which has better reviews, Simple Unit Converter or Conversion Calculator Plus?
Conversion Calculator Plus is rated higher. Simple Unit Converter averages 4.3 out of 5 from 221 ratings, while Conversion Calculator Plus averages 4.7 from 15K ratings.
Do Simple Unit Converter or Conversion Calculator Plus have ads?
Conversion Calculator Plus shows ads; Simple Unit Converter does not.

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