Comparison

Unit Converter vs ConvertX

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

Head to head
About

Unit Converter

Features
Read full description

Unit Converter Pro converts currencies, crypto and units in one fast, native app for iPhone and iPad. Version 2.0 is rebuilt from the ground up. CALCULATOR-STYLE KEYPAD • Big round keys and a large display, just like Calculator • Swap source and result with one tap • Paste amounts from anywhere, including European number formats like 1.234,56 CURRENCY CONVERTER • Live exchange rates for 140 currencies: USD, EUR, GBP, JPY, CHF, CAD, AUD, CNY, INR and many more • See all your currencies at once and tap any result to convert from it • Drag to reorder, swipe to remove or favorite • Cached rates keep working offline while you travel CRYPTO CONVERTER • 120 cryptocurrencies with live market prices: Bitcoin, Ethereum, Solana, XRP, Cardano, Dogecoin and more • Convert crypto to crypto or crypto to fiat UNIT CONVERTER Switch between 8 categories with one tap: • Length, Weight, Temperature, Volume • Area, Speed, Data, Time MADE FOR BIG SCREENS On iPad and foldables, your results fill the left side and the keypad sits under your right thumb. Works in landscape on iPhone, with full light and dark mode support. HOME SCREEN WIDGETS • Multi-Currency Converter widget (free) • Crypto Converter widget (Pro) PRIVATE BY DESIGN No accounts, no ads, no tracking. Improved VoiceOver support throughout. UNIT CONVERTER PRO SUBSCRIPTION Pro unlocks the Crypto Converter widget. Choose monthly or yearly. Payment is charged to your Apple Account and renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your App Store account settings. Privacy Policy: https://midego.net/convert-tool/privacy Terms of Use: https://midego.net/convert-tool/legal

About

ConvertX

Features
Read full description

Convert any unit in seconds with ConvertX — a powerful unit converter for engineers, students, professionals, and everyday use. From everyday measurements to advanced engineering conversions. -> 400+ UNITS ACROSS 44 CATEGORIES Quickly convert everyday and technical measurements, including: • Length — meters, kilometers, miles, feet, inches • Weight & Mass — kilograms, grams, pounds, ounces • Temperature — Celsius, Fahrenheit, Kelvin • Area — square meters, square feet, acres • Volume — liters, milliliters, gallons • Speed — km/h, mph, m/s • Time — seconds, minutes, hours, days • Data Storage — bits, bytes, KB, MB, GB • Pressure — Pa, bar, psi, atm • Energy — joules, calories, kWh • Power — watts, kilowatts, horsepower • Angle — degrees, radians • Frequency — Hz, kHz, MHz • Fuel Efficiency • And many more measurement conversions -> CURRENCY CONVERTER Convert between 30+ currencies using live exchange rates. Currency data can be cached for convenient access when an internet connection is unavailable. -> ENGINEERING CONVERSIONS — PRO Convert advanced engineering and scientific measurements with dedicated tools for professional and technical use. Mechanical Engineering: • Force • Torque • Stress • Density • Dynamic & Kinematic Viscosity • Acceleration • Angular Velocity Civil Engineering: • Flow Rate • Stress Intensity • Illuminance • Concentration • Water Hardness Electrical Engineering: • Voltage • Resistance • Capacitance • Inductance • Current Density Thermal & HVAC: • Thermal Conductivity • Heat Flux • Cooling Load • Specific Heat Science: • Radiation Dose • Radioactivity • Molar Amount Material Science: • Hardness — HRC, HV, HB, Shore • Elastic Modulus -> FAST AND EASY TO USE Convert measurements quickly with a clean interface designed for everyday and professional use. • Large, easy-to-read results • Swap units with one tap • Copy results to your clipboard • Save frequently used conversions to Favorites • View your recent conversion history • Fast calculations • Clean dark interface • Unit calculations work offline -> OFFLINE UNIT CONVERTER Convert units without an internet connection. Everyday and engineering calculations work directly on your device, making ConvertX useful at home, at work, in classrooms, laboratories, workshops, engineering sites, and while traveling. -> BUILT FOR ENGINEERS, STUDENTS & EVERYDAY USERS ConvertX is useful for: • Mechanical Engineers • Civil Engineers • Electrical Engineers • HVAC Technicians • Engineering Students • Science Students • Technicians • Construction Professionals • Material Scientists • Chemistry & Physics Students • Teachers • Developers • Travelers • DIY Users -> SIMPLE & PRIVATE No account is required to use ConvertX. Unit calculations work directly on your device, including offline conversions. Convert meters to feet, kilometers to miles, kilograms to pounds, Celsius to Fahrenheit, liters to gallons, psi to bar, watts to horsepower, and hundreds of other units in seconds. Whether you need a quick measurement conversion for everyday use or advanced engineering conversions for professional work, ConvertX brings everyday, scientific, engineering, and currency conversions together in one app. -> CONVERTX PRO Unlock all 29 engineering categories with a one-time purchase. Lifetime access. No subscription. One payment includes all current engineering categories and future engineering categories. Get ConvertX today and keep a powerful unit conversion toolkit at your fingertips. Whether you're an engineer, student, professional, traveler, or simply need a quick conversion, ConvertX makes everyday and technical unit conversions fast, simple, and convenient — even when you're offline.

Screenshots

Unit Converter4 screens
ConvertX4 screens

Verdict

The call

The clearest difference is ads: Unit Converter at none against ConvertX's shown. Unit Converter also leads on update cadence (every 2 weeks vs every 7 months). ConvertX's advantage is iOS requirement (15.6 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Unit Converter sells 3 in-app purchases, starting at $0.99 per month and ConvertX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Unit Converter ships an update every 2 weeks, ConvertX every 7 months. Both last shipped on October 31, 2026.

Scorecard3 real differences Ā· 3 level
Unit Converter versus ConvertX: the parameters behind the verdict, then further details
ParameterUnit ConverterConvertX
PriceFreeFree
Update frequencyEvery 2 weeks — betterEvery 7 months
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.6 — better
Further details — not scored
Size3 MB35 MB
Age rating4+17+
DeveloperMichiel de GooijerDhaval Panasara

In-app purchases

3 purchases

Unit Converter

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Yearly$3.991 Year
One-time1
  • Small Tip$0.99
1 purchases

ConvertX

One-time1
  • LifeTime Premium$4.99

Questions

Is Unit Converter free?
Unit Converter is free to download, with in-app purchases available.
Is ConvertX free?
ConvertX is free to download, with in-app purchases available.
Do Unit Converter or ConvertX have ads?
ConvertX shows ads; Unit Converter does not.
Which is updated more often, Unit Converter or ConvertX?
Unit Converter ships an update every 2 weeks, and ConvertX every 7 months. Most recently, Unit Converter was updated on October 31, 2026 and ConvertX on October 31, 2026.

Other comparisons