Comparison

Smart Unit Conversion vs Unit Converter All Categories

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

Head to head
About

Smart Unit Conversion

Features
Read full description

This is a smart unit convertor that: 1. Support 21 languages and the Local Units 2. You can Customize the Sequence of Units 3. European number format supported Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Unit Converter All Categories

Features
Read full description

Universal Unit Converter is the ultimate all-in-one conversion tool for professionals, students, and everyday users. Whether you're solving homework problems, performing engineering calculations, or managing tasks in the lab or workshop, this app has everything you need in one beautifully organized interface. With over 70 converters spread across 8 specialized categories, this app helps you convert almost anything โ€” from simple length and weight to advanced thermal resistance, magnetism, radiation, and more. Main Categories & Features Common Converters Quickly convert essential everyday values like: Length Weight and Mass Volume Temperature Area Pressure Energy Speed Data Storage Time, Power, Force, and more Engineering Tools Perfect for students and professionals in mechanical or civil engineering: Angular velocity & acceleration Density & specific volume Moment of inertia Torque & force moments Heat and Thermal Systems Handle all thermal analysis needs with: Thermal conductivity Specific heat capacity Thermal resistance Heat transfer coefficient Fuel efficiency (mass & volume) Fluid Dynamics Explore various physical and chemical properties in: Flow rates (volume, mass, molar) Viscosity (dynamic & kinematic) Concentration & permeability Surface tension Light and Optics Calculate optical parameters with: Luminance Illumination Light frequency & wavelength Digital image resolution Electricity Designed for electrical engineers and electronics enthusiasts: Current, voltage, resistance Capacitance & inductance Conductance, conductivity, and resistivity Electric field strength & charge density Magnetism Convert key magnetic quantities: Magnetic field strength Magnetic flux & flux density Magnetomotive force Radiology and Radiation Medical and scientific users can convert: Radiation exposure (Gy, Bq, C/kg) Absorbed dose & activity Why Choose Universal Unit Converter? Clean and intuitive UI with categorized converters Accurate conversion formulas used by professionals Offline mode โ€” No internet needed Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Smart Unit Conversion4 screens
Unit Converter All Categories4 screens

Verdict

The call

The clearest difference is ads: Unit Converter All Categories at none against Smart Unit Conversion's shown. Unit Converter All Categories also leads on update cadence (every 5 weeks vs every 15 months). Smart Unit Conversion's advantage is iOS requirement (13.4 vs 16.6). On price, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year and Unit Converter All Categories sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Smart Unit Conversion ships an update every 15 months, Unit Converter All Categories every 5 weeks. Both last shipped on November 7, 2026.

Scorecard3 real differences ยท 3 level
Smart Unit Conversion versus Unit Converter All Categories: the parameters behind the verdict, then further details
ParameterSmart Unit ConversionUnit Converter All Categories
PriceFreeFree
Update frequencyEvery 15 monthsEvery 5 weeks โ€” better
AdsYesNo โ€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.4 โ€” better16.6
Further details โ€” not scored
Size41 MB12 MB
Age rating17+4+
DeveloperYui LauVladislav Zhirnov

In-app purchases

1 purchases

Smart Unit Conversion

Subscriptions1
  • 1 Year$1.991 Year
3 purchases

Unit Converter All Categories

Subscriptions2
  • Full version / monthly$0.991 Month
  • Full version / year$2.991 Year
One-time1
  • Remove ADS$4.99

Questions

Is Smart Unit Conversion free?
Smart Unit Conversion is free to download, with in-app purchases available.
Is Unit Converter All Categories free?
Unit Converter All Categories is free to download, with in-app purchases available.
Do Smart Unit Conversion or Unit Converter All Categories have ads?
Smart Unit Conversion shows ads; Unit Converter All Categories does not.
Which is updated more often, Smart Unit Conversion or Unit Converter All Categories?
Smart Unit Conversion ships an update every 15 months, and Unit Converter All Categories every 5 weeks. Most recently, Smart Unit Conversion was updated on November 7, 2026 and Unit Converter All Categories on November 7, 2026.

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