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.
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.
- Length conversions
- Area conversions
- Mass conversions
- Temperature conversions
- Volume conversions
- Density conversions
- Flow rate conversions
Read full descriptionHide 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!
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | Simple Unit Converter | Conversion Calculator Plus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (221 ratings) | 4.7 (15K ratings) — better |
| Positive reviews | 78.1% of reviews — better | 69.5% of reviews |
| Number of ratings | 221 | 15K — better |
| Update frequency | — | Every 2 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 6.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 8 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Jian Yih Lee | Adysseus |
Customer experience
Simple Unit Converter
Conversion Calculator Plus
User reviews
Simple Unit Converter
From 221 App Store ratingsWhat 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 ratingsWhat 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
Simple Unit Converter
No in-app purchases
Conversion Calculator Plus
- No Ads For One Year1 Year trial$9.991 Year





